* Sigh, ircd would crash if no TS was passed on interserver NICK command.

* Allow the user to change nicks if the nick case is different.
* Fixed /STATS u, which was giving fractional answers for the ircd uptime.
* /LIST now accepts a channel as a valid argument, or a comma-seperated list
  of channels.  This is per RFC1459.
* Allow +p and +s channels to be seen in /LIST if the user is oper or a member
  of that channel.
* Allow users to disable SUMMON/USERS if they wish with a variable up top.
  This is mostly to implement the appropriate 'cmd is disabled' numeric, but
  gives someone the option if they don't want these commands enabled.
* Imagine that, more miscelaneous cleanup.