config: add unix socket example to sample configuration

sample-lnd.conf

@@ -14,7 +14,7 @@
 
 ; Number of logfiles that the log rotation should keep. Setting it to 0 disables deletion of old log files.
 ; maxlogfiles=3
-; 
+;
 ; Max log file size in MB before it is rotated.
 ; maxlogfilesize=10
 
@@ -29,7 +29,7 @@
 ; the line below.
 ; no-macaroons=true
 
-; Path to write the admin macaroon for lnd's RPC and REST services if it 
+; 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 main home directory.
 ; Applications that are able to read this file, gains admin macaroon access
@@ -38,11 +38,11 @@
 ; Path to write the read-only macaroon for lnd's RPC and REST services if it
 ; doesn't exist. This can be set if one wishes to store the read-only macaroon
 ; in a distinct location. The read only macaroon allows users which can read
-; the file to access RPC's which don't modify the state of the daemon.
+; the file to access RPCs which don't modify the state of the daemon.
 ; readonlymacaroonpath=~/.lnd/readonly.macaroon
-                       
 
-; Specify the interfaces to listen on for p2p connections.  One listen 
+
+; Specify the interfaces to listen on for p2p connections.  One listen
 ; address per line.
 ; All ipv4 on port 9735:
 ;   listen=0.0.0.0:9735
@@ -50,25 +50,29 @@
 ;   listen=0.0.0.0:9735
 ;   listen=[::1]:9736
 
-; Disable listening for incoming p2p connections.  This will override all 
+; Disable listening for incoming p2p connections.  This will override all
 ; listeners.
 ; nolisten=1
 
-; Specify the interfaces to listen on for gRPC connections.  One listen 
+; Specify the interfaces to listen on for gRPC connections.  One listen
 ; address per line.
 ; Only ipv4 localhost on port 10009:
 ;   rpclisten=localhost:10009
 ; On ipv4 localhost port 10009 and ipv6 port 10010:
 ;   rpclisten=localhost:10009
 ;   rpclisten=[::1]:10010
+; On an Unix socket:
+;   rpclisten=unix:///var/run/lnd/lnd-rpclistener.sock
 
-; Specify the interfaces to listen on for REST connections.  One listen 
+; Specify the interfaces to listen on for REST connections.  One listen
 ; address per line.
 ; All ipv4 interfaces on port 8080:
 ;   restlisten=0.0.0.0:8080
 ; On ipv4 localhost port 80 and 443:
 ;   restlisten=localhost:80
 ;   restlisten=localhost:443
+; On an Unix socket:
+;   restlisten=unix:///var/run/lnd-restlistener.sock
 
 
 ; Adding an external IP will advertise your node to the network. This signals
@@ -135,7 +139,7 @@ bitcoin.active=1
 
 ; Use Bitcoin's test network.
 ; bitcoin.testnet=1
-; 
+;
 ; Use Bitcoin's simulation test network
 bitcoin.simnet=1
 
@@ -146,7 +150,7 @@ bitcoin.simnet=1
 bitcoin.node=btcd
 
 ; Use the bitcoind back-end
-; bitcoin.node=bitcoind 
+; bitcoin.node=bitcoind
 
 ; Use the neutrino (light client) back-end
 ; bitcoin.node=neutrino
@@ -163,7 +167,7 @@ bitcoin.node=btcd
 ; setting is assumed to be localhost with the default port for the current
 ; network.
 ; btcd.rpchost=localhost
-              
+
 ; Username for RPC connections to btcd. By default, lnd will attempt to
 ; automatically obtain the credentials, so this likely won't need to be set
 ; (other than for simnet mode).
@@ -181,7 +185,7 @@ bitcoin.node=btcd
 ; The raw bytes of the daemon's PEM-encoded certificate chain which will be used
 ; to authenticate the RPC connection. This only needs to be set if the btcd
 ; node is on a remote host.
-; btcd.rawrpccert=   
+; btcd.rawrpccert=
 
 
 [Bitcoind]
@@ -190,7 +194,7 @@ bitcoin.node=btcd
 ; setting is assumed to be localhost with the default port for the current
 ; network.
 ; bitcoind.rpchost=localhost
-              
+
 ; Username for RPC connections to bitcoind. By default, lnd will attempt to
 ; automatically obtain the credentials, so this likely won't need to be set
 ; (other than for a remote bitcoind instance).
@@ -205,7 +209,7 @@ bitcoin.node=btcd
 ; bitcoind. By default, lnd will attempt to automatically obtain this
 ; information, so this likely won't need to be set (other than for a remote
 ; bitcoind instance).
-; bitcoind.zmqpath=tcp://127.0.0.1:28332 
+; bitcoind.zmqpath=tcp://127.0.0.1:28332
 
 
 [neutrino]
@@ -232,7 +236,7 @@ bitcoin.node=btcd
 litecoin.node=ltcd
 
 ; Use the litecoind back-end
-; litecoin.node=litecoind 
+; litecoin.node=litecoind
 
 
 [Ltcd]
@@ -241,7 +245,7 @@ litecoin.node=ltcd
 ; setting is assumed to be localhost with the default port for the current
 ; network.
 ; ltcd.rpchost=localhost
-              
+
 ; Username for RPC connections to ltcd. By default, lnd will attempt to
 ; automatically obtain the credentials, so this likely won't need to be set
 ; (other than for simnet mode).
@@ -259,7 +263,7 @@ litecoin.node=ltcd
 ; The raw bytes of the daemon's PEM-encoded certificate chain which will be used
 ; to authenticate the RPC connection. This only needs to be set if the ltcd
 ; node is on a remote host.
-; ltcd.rawrpccert= 
+; ltcd.rawrpccert=
 
 
 [Litecoind]
@@ -268,7 +272,7 @@ litecoin.node=ltcd
 ; setting is assumed to be localhost with the default port for the current
 ; network.
 ; litecoind.rpchost=localhost
-              
+
 ; Username for RPC connections to litecoind. By default, lnd will attempt to
 ; automatically obtain the credentials, so this likely won't need to be set
 ; (other than for a remote litecoind instance).
@@ -305,7 +309,7 @@ litecoin.node=ltcd
 [tor]
 ; 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 
+; between 1024 and 65535
 ; tor.socks=9050
 
 ; The DNS server as IP:PORT that Tor will use for SRV queries - NOTE must have