Hopo Better Mineshaft

**--- The Fix Crash Update --- **♦ Fixed a imporant crash when generating new chunks, a super rare bad event, saturating the server, not happening anymore. ♦ To fix the other issue, mineshafts have been a little bit smaller, you probably won't notice this tho ♦ Fixed some splash potions not being name correctly ♦ Remove vanilla mesa mineshaft generating at normal mountains.