This commit modifies the Alias type to only hold the non-zero portion
of the alias as encoded on the wire. Previously the entire 32-bytes
would be read and stored, including the zeroes at the end used as
padding. Within the constructor, we now parse the alias properly,
discarding the trailing zeroes within the passed byte slice.
Additionally, the .String() method of Alias will now also only print
the non-zero prefix of the decoded alias.
This commit temporarily disables the signature validation for all
announcement related messages which should be authenticated by one or
many parties. This feature is being disabled as we don’t yet generate
valid signatures for our advertisements and the validation of the
messages should be placed in the layer 3 discovery service rather than
within within the message parsing layer.
This commit separates out the ChannelID into a new file, with
additional helper methods for conversion and formatting. With this
commit, the struct is now more general purpose and can be used in the
new routing package, database, and other related sub-systems.
