- Improved the format of battle_calc_cardfix so that it's actually readable and added various comments so others can actually understand what's going on there
- Reverted the change from r17216 and replaced it with another fix that will now work for all skills (still related to bugreport:6991)
- Implemented the official stun chance of Bash based on an Aegis leak; basically the base chance (5% per level above 5) will get multiplied by BaseLevel/50.0, so on level 50, it will be 1x, on level 75 it will be 1.5x and on level 99 it will be almost 2x (prior reductions), e.g. a level 99 knight using bash 10 will have a 49.5% base success chance to stun with it (if he has learned the quest skill)

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17222 54d463be-8e91-2dee-dedb-b68131a5f0ec