- removed obsolete (since r1!) ExpPer column from mob_db
- official way to drop MVP rewards (always starts from first slot)
- added MAX_MVP_DROP as define for max possible MVP reward slots
* Updated mob_db SQL scripts.
* Removed some renewal only monsters from pre-RE mob_db (were commented out anyway).
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@15531 54d463be-8e91-2dee-dedb-b68131a5f0ec