Undocumented options pid for starting script

pid show the pidfile and current pid for debug purpose
pidfile in eggless.conf is a tcl expression so not usable in bash
Send hello to all root
Send MOTD save line to adminchan
Send hello later
Add ::irc proc for user who change nick
remove user from ::irc::users($chan) when lefting a chan
Add user quit management for internal vars
Add nick change management for internal vars