Describe your changes

PP breaks on catch if both the accuracy and the 50s are specified. In VC we argued the best way to solve this is raising an exception in the usecase, and dropping specifying acc where possible, since it's a useless info.

This PR fixes catch PP, meaning bancho.py hosters will need to re-calculate all PP. Before doing this, I'd suggest looking into #573, as it improves the functionality of the recalc script and might be significant with this change.