* Fixed gm_account_db not being deallocated in login-converter.c.
* Refactoring names and documentation in db.h/db.c:
- changed 'struct dbt' to 'struct DBMap' and 'DB' to 'DBMap*'
- changed 'struct db' to 'struct DBMap_impl' and 'DB_impl' to 'DBMap_impl*'
- changed COUNT to DB_COUNTSTAT and made it's existence not depend on DB_ENABLE_STATS
- removed some @see links and corrected small typos in the documentation
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@11698 54d463be-8e91-2dee-dedb-b68131a5f0ec