Added upkeep command.
Added upkeep command.

kblin/supybot-gsoc,frumiousbandersnatch/supybot-code,jeffmahoney/supybot,ProgVal/Limnoria-test,mazaclub/mazabot-core,Ban3/Limnoria,raboof/supybot,buildbot/supybot,Ban3/Limnoria,mazaclub/mazabot-core,prashantpawar/supybot-rothbot,ProgVal/Limnoria-test,haxwithaxe/supybot