Lower message throttle to 0.4mps to account for Freenode policies.
Lower message throttle to 0.4mps to account for Freenode policies.

Freenode doesn't actually state this anywhere but we've started to
get Excess Flood kicks more often lately.

StollD/irclogger,StollD/irclogger,whitequark/irclogger,whitequark/irclogger,StollD/irclogger,StollD/irclogger,whitequark/irclogger,whitequark/irclogger