This commit fixes an issue where the server may start up without
a "server_id" assigned, which in turn will cause a follower to
be unable to connect.
This issues is caused by including a pre-generated "data/config"
file that does not include the "server_id" field.
This commit cleans up various Go code in the internal directory.
- Ensures comments on exported functions
- Changes all *Server receiver in all files to be "s", instead
of mixed "c", "s", "server", etc.
- Silenced Go warnings for if/else with returns.
- Cleaned up import ordering.
tidwall