A bunch of patches

[Tim Angus]

Derived from
http://www.quakesrc.org/forums/viewtopic.php?t=5374&postdays=0&postorder=asc&start=0

The CL_Rcon_f fix is just a series of stupid buffer overflow bugs.

It looks as if the q3infoboom bug has already been fixed in ioQ3 in a
different way, though this patch addresses the cause. The existing fix
should stay since it's a sensible sanity check anyway.

The rest are fairly self explanatory.

Disclaimer: I created the patches, but I didn't discover the bugs.
For future reference: Tim Angus = Timbo = http://tremulous.net/
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