Leak and Optimisation

Fix many typo and optimisation found by :
http://rathena.org/cppreport/index.html
Fix multiple unsafe scanf of string
Fix multiple battle wrong check (elemental bonus)
Fix camouflage defense reduction and cap expiato def reduction
Fix geoip leak
Upd few documentation in doxygen style
Fix path working directory issue to start servers
(now you won't need to be in maindir to launch server)