Changes the initialism for stat collecting on summon magic to SU because SM was taken by smoke. On the stat page this will result in smoke being overreported until a full month after this change has been live on both servers.

For judgement purposes you can probably assume that nearly all "smoke" spells on the stat page are actually summon magic, because who the hell takes smoke?
Merge pull request #2191 from Incoming5643/SMconfusion

Changes the initialism for stat collecting on summon magic to SU