docs: update sample-lnd.conf

In this commit, we update the `sample-lnd.conf` example config file to
be up to date with all the new configuration parameters we've added over
the past few release.

sample-lnd.conf

@@ -26,7 +26,6 @@
 ; it hasn't yet received a response.
 ; acceptortimeout=15s
 
-
 ; Path to TLS certificate for lnd's RPC and REST services.
 ; tlscertpath=~/.lnd/tls.cert
 
@@ -41,11 +40,27 @@
 ; (old tls files must be deleted if changed)
 ; tlsextradomain=
 
+; If set, then all certs will automatically be refreshed if they're close to 
+; expiring, or if any parameters related to extra IPs or domains in the cert 
+; change.
+; tlsautorefresh=true
+
+; A list of domains for lnd to periodically resolve, and advertise the resolved
+; IPs for the backing node. This is useful for users that only have a dynamic IP,
+; or want to expose the node at a domain.
+; externalhosts=my-node-domain.com
+
 ; Disable macaroon authentication. Macaroons are used are bearer credentials to
 ; authenticate all RPC access. If one wishes to opt out of macaroons, uncomment
 ; the line below.
 ; no-macaroons=true
 
+; Enable free list syncing for the default bbolt database. This will increase
+; start up time, but can result in performance degradation for very large
+; databases, and also result in higher memory usage. If "free list corruption"
+; is detected, then this flag may resolve things.
+; sync-freelist=true
+
 ; Path to write the admin macaroon for lnd's RPC and REST services if it
 ; doesn't exist. This can be set if one wishes to store the admin macaroon in a
 ; distinct location. By default, it is stored within lnd's network directory.
@@ -66,6 +81,12 @@
 ; write access to all invoice related RPCs.
 ; invoicemacaroonpath=~/.lnd/data/chain/bitcoin/simnet/invoice.macaroon
 
+; A period to wait before for closing channels with outgoing htlcs that have 
+; timed out and are a result of this nodes instead payment. In addition to our 
+; current block based deadline, is specified this grace period will also be taken
+; into account.  
+; payments-expiration-grace-period=30
+
 
 ; Specify the interfaces to listen on for p2p connections.  One listen
 ; address per line.
@@ -99,6 +120,10 @@
 ; On an Unix socket:
 ;   restlisten=unix:///var/run/lnd-restlistener.sock
 
+; A series of domains to allow cross origin access from. This controls the CORs
+; policy of the REST RPC proxy.
+; restcors=https://my-special-site.com
+
 
 ; Adding an external IP will advertise your node to the network. This signals
 ; that your node is available to accept incoming channels. If you don't wish to
@@ -146,6 +171,92 @@
 ; channels smaller than this will be rejected, default value 20000.
 ; minchansize=
 
+; The duration that a peer connection must be stable before attempting to send a
+; channel update to reenable or cancel a pending disables of the peer's channels
+; on the network. (default: 19m0s)
+; chan-enable-timeout=22m
+
+; The duration that must elapse after first detecting that an already active 
+; channel is actually inactive and sending channel update disabling it to the 
+; network. The pending disable can be canceled if the peer reconnects and becomes
+; stable for chan-enable-timeout before the disable update is sent.
+; (default: 20m0s)
+; chan-disable-timeout=22m
+                                                              
+; The polling interval between attempts to detect if an active channel has become
+; inactive due to its peer going offline. (default: 1m0s)
+; chan-status-sample-interval=2m
+
+; Disable queries from the height-hint cache to try to recover channels stuck in
+; the pending close state. Disabling height hint queries may cause longer chain
+; rescans, resulting in a performance hit. Unset this after channels are unstuck
+; so you can get better performance again.
+; height-hint-cache-query-disable=true
+
+; The polling interval between historical graph sync attempts. Each historical
+; graph sync attempt ensures we reconcile with the remote peer's graph from the
+; genesis block. (default: 1h0m0s)
+; historicalsyncinterval=2h
+
+; If true, will not reply with historical data that matches the range specified
+; by a remote peer's gossip_timestamp_filter. Doing so will result in lower
+; memory and bandwidth requirements.
+; ignore-historical-gossip-filters=true
+
+; If true, lnd will not accept channel opening requests with non-zero push
+; amounts. This should prevent accidental pushes to merchant nodes.
+; rejectpush=true
+
+; If true, lnd will not forward any HTLCs that are meant as onward payments. This
+; option will still allow lnd to send HTLCs and receive HTLCs but lnd won't be
+; used as a hop.
+; rejecthtlc=true
+
+; If true, will apply a randomized staggering between 0s and 30s when
+; reconnecting to persistent peers on startup. The first 10 reconnections will be
+; attempted instantly, regardless of the flag's value
+; stagger-initial-reconnect=true
+
+; The maximum number of blocks funds could be locked up for when forwarding
+; payments. (default: 2016)
+; max-cltv-expiry=2016
+
+; The maximum percentage of total funds that can be allocated to a channel's
+; commitment fee. This only applies for the initiator of the channel. Valid
+; values are within [0.1, 1]. (default: 0.5)
+; max-channel-fee-allocation=0.9
+
+; If true, lnd will abort committing a migration if it would otherwise have been
+; successful. This leaves the database unmodified, and still compatible with the
+; previously active version of lnd.
+; dry-run-migration=true
+
+; If true, option upfront shutdown script will be enabled. If peers that we open
+; channels with support this feature, we will automatically set the script to
+; which cooperative closes should be paid out to on channel open. This offers the
+; partial protection of a channel peer disconnecting from us if cooperative
+; close is attempted with a different script.
+; enable-upfront-shutdown=true
+ 
+; If true, spontaneous payments through keysend will be accepted. [experimental]
+; accept-keysend=true
+
+; If non-zero, keysend payments are accepted but not immediately settled. If the
+; payment isn't settled manually after the specified time, it is canceled
+; automatically. [experimental]
+; keysend-hold-time=true
+
+; If true, our node will allow htlc forwards that arrive and depart on the same
+; channel.
+; allow-circular-route=true
+
+; Time in milliseconds between each release of announcements to the network
+; trickledelay=180000
+
+; The number of peers that we should receive new graph updates from. This option
+; can be tuned to save bandwidth for light clients or routing nodes. (default: 3)
+; numgraphsyncpeers=9
+
 ; The alias your node will use, which can be up to 32 UTF-8 characters in
 ; length.
 ; alias=My Lightning ☇
@@ -339,7 +450,32 @@ litecoin.node=ltcd
 ; amount of attempted channels will still respect the maxchannels param.
 ; autopilot.allocation=0.6
 
+; Heuristic to activate, and the weight to give it during scoring. (default:
+; {preferential:1})
+; autopilot.heuristic={topk_centrality:1}
+
+; The smallest channel that the autopilot agent should create (default: 20000)
+; autopilot.minchansize=20000
+
+; The largest channel that the autopilot agent should create (default: 16777215)
+; autopilot.maxchansize=20000
+
+; Whether the channels created by the autopilot agent should be private or not.
+; Private channels won't be announced to the network.
+; autopilot.private=true
+
+; The minimum number of confirmations each of your inputs in funding transactions
+; created by the autopilot agent must have. (default: 1)
+; autopilot.minconfs=2
+
+; The confirmation target (in blocks) for channels opened by autopilot. (default:
+; 3)
+; autopilot.conftarget=2
+
 [tor]
+; Allow outbound and inbound connections to be routed through Tor
+; tor.active                                            
+
 ; The port that Tor's exposed SOCKS5 proxy is listening on. Using Tor allows
 ; outbound-only connections (listening will be disabled) -- NOTE port must be
 ; between 1024 and 65535
@@ -356,6 +492,35 @@ litecoin.node=ltcd
 ; in with lnd's traffic.
 ; tor.streamisolation=true
 
+
+; Enable Tor stream isolation by randomizing user credentials for each
+; connection.
+; tor.streamisolation=true
+
+; The host:port that Tor is listening on for Tor control connections (default:
+; localhost:9051)
+; tor.control=localhost:9091                                      
+
+; IP address that Tor should use as the target of the hidden service
+; tor.targetipaddress=                                  
+ 
+; The password used to arrive at the HashedControlPassword for the control port.
+; If provided, the HASHEDPASSWORD authentication method will be used instead of
+; the SAFECOOKIE one.
+; tor.password=plsdonthackme                                         
+ 
+; Automatically set up a v2 onion service to listen for inbound connections
+; tor.v2=true
+ 
+; Automatically set up a v3 onion service to listen for inbound connections
+; tor.v3=true
+ 
+; The path to the private key of the onion service being created
+; tor.privatekeypath=/path/to/torkey                                   
+ 
+;The path to the private key of the watchtower onion service being created
+; tor.watchtowerkeypath=/other/path/                                
+
 [watchtower]
 ; Enable integrated watchtower listening on :9911 by default.
 ; watchtower.active=true
@@ -436,3 +601,94 @@ litecoin.node=ltcd
 ; The amount of time we should wait between disk space health checks. This
 ; value must be >= 1m.
 ; healthcheck.diskspace.interval=6h
+
+[routerrpc]
+; Minimum required route success probability to attempt the payment (default:
+; 0.01)
+; routerrpc.minrtprob=1             
+
+; Assumed success probability of a hop in a route when no other information is
+; available. (default: 0.6)
+; routerrpc.apriorihopprob=0.2                             
+
+; Weight of the a priori probability in success probability estimation. Valid
+; values are in [0, 1]. (default: 0.5)
+; routerrpc.aprioriweight=0.3                              
+
+; Defines the duration after which a penalized node or channel is back at 50%
+; probability (default: 1h0m0s)
+; routerrpc.penaltyhalflife=2h                            
+
+; The (virtual) cost in sats of a failed payment attempt (default: 100)
+; routerrpc.attemptcost=90                                
+
+; The maximum number of payment results that are held on disk by mission control
+; (default: 1000)
+; routerrpc.maxmchistory=900                              
+
+; Path to the router macaroon
+; routerrpc.routermacaroonpath=                         
+
+[workers]
+; Maximum number of concurrent read pool workers. This number should be
+; proportional to the number of peers. (default: 100)
+; workers.read=200                                         
+
+; Maximum number of concurrent write pool workers. This number should be
+; proportional to the number of CPUs on the host.  (default: 8)
+; workers.write=8                                       
+
+; Maximum number of concurrent sig pool workers. This number should be
+; proportional to the number of CPUs on the host. (default: 8)
+; workers.sig=4                                          
+
+[caches]
+
+; Maximum number of entries contained in the reject cache, which is used to speed
+; up filtering of new channel announcements and channel updates from peers. Each
+; entry requires 25 bytes. (default: 50000)
+; caches.reject-cache-size=900000                            
+
+; Maximum number of entries contained in the channel cache, which is used to
+; reduce memory allocations from gossip queries from peers. Each entry requires
+; roughly 2Kb. (default: 20000)
+; caches.channel-cache-size=9000000
+
+[protocol]
+; If set, then lnd will create and accept requests for channels larger than 0.16
+; BTC
+; protocol.wumbo-channels=true
+
+; Set to enable experimental support for anchor commitments, won't work with watchtowers yet.
+; protocol.anchors=true
+
+[db]
+; The selected database backend. The current default backend is "bolt". lnd
+; also has experimental support for etcd, a replicated backend.
+; db.backend=bolt                                           
+
+[etcd]
+; Etcd database host.
+; db.etcd.host=localhost:2379
+
+; Etcd database user.
+; db.etcd.user=userscopedforlnd
+ 
+; Password for the database user.
+; db.etcd.pass=longandsekrit
+
+; Path to the TLS certificate for etcd RPC.
+; db.etcd.cert_file=/key/path
+ 
+; Path to the TLS private key for etcd RPC.
+; db.etcd.key_file=/a/path
+ 
+; Whether we intend to skip TLS verification
+; db.etcd.insecure_skip_verify=true                         
+ 
+; Whether to collect etcd commit stats.
+; db.etcd.collect_stats=true                                 
+
+[bolt]
+; If true, prevents the database from syncing its freelist to disk. 
+; db.bolt.nofreelistsync=1