Tweak the shotgun

[Victor]

Weapon stats are in "source/src/server.h". Compiling instructions are on the ACR wiki, which might be outdated by now.

Does 2.6.3 really have a bot issue that 2.6.2 doesn't have? If so, I might have to look at the history of source/src/bot to find out why.

The steps look like this:

1. Download dev version of ACR (download .zip from GitHub or git clone) or use source in Linux package
   
2. Edit stats in source/src/server.h
   
3. (Re)compile ACR
   
4. Test the changes and possibly go to step 2.