Reduce SQL number of separate sql queries in situations they could be done all at once about bancho.py

[cmyui]

I should also note that this is pretty uncommon in the codebase and most of these occurrences are from some of the oldest portions of the code. For example the link to the example I provided above is actually from gulag's 2nd ever commit, and my development practices have definitely improved since :P.

[cmyui]

Finished the obvious ones, going to do some more things like probably pass a db cursor into domains.cho.login() and perhaps make them optional arguments in a few other functions/methods for special case optimizations.