It's not really used and I'd rather not have it here unless I'm able to actively maintain it properly and build out the web interface.

I might re-add it later but for now I'd rather not have it unless anyone's actively using it.

also, remove the self-notification check; clients are probably not
monitoring themselves, and it doesn't much matter if they are

fix various data races, including 2 introduced by #139

* Lower ident timeout to 1.5 seconds, as discussed in #oragono
* Enforce connection limits at the granularity of ipv4 /32's and ipv6 /64's
* Raise the limit on number of new connections to 64 every 10 minutes
  (for the benefit of people behind large IPv4 NATs)

refactor [dk]linemanagers

* Synchronize map accesses
* Be more aggressive about cleaning up expired lines
* CIDR dlines did not work (nil dereference)

send the actual quit message to friends

support for PROXY was removed in 43e28e2fef. After discussion,
it's worth keeping around in case of client compatibility issues,
and until /rehash support is more mature.