[NeoStats-Devel] New bot nick code

I have made a few changes to the bot nick code. 

Firstly, I have optimised GetBotNick since the for/switch loop was overkill
for what was required since in the majority of cases, botnick should be
available and likely protected by qlines. 

Secondly, I have altered the generation routine to remove the unecessary
strlen calls it used and take this as a parameter. I am thinking this could
be a useful base for a general nickname generator we can expose to modules.
Might come in handy for SecureServ onjoin bots. 

Maybe something along the lines of ( nickstub, stublen, numbercount,
lettercount ) where nickstub is our base, stublen the length of the base,
numbercount the number of numbers we want to generate, 0 to disable and the
same for lettercount. Something to consider.

Mark.