Redo a lot of the timer stuff, adding support for sub-second timers
dns: Do request timeouts
Don't delete timers unless explicitly told to
Do RDNS on incoming connections

This still needs to block registration, though
conn: Postpone command dispatching until a hostname is decided upon
user: Use conn->host when initially assigning user->host
Add fixes so things will build with 4.3 BSD cc
Add -Wall, fix resulting warnings, update README