Tools follow up

check-doc.pl :
 add result message when no issues is found
config.pl :
 update centos enable coredump setup
Upd build_doc

Fix small newline typo.
Add option argument in script.
Prevent rebuilding by default if git is unchanged.
see build_doc --help for available option
InterPacket_rearrange

-Move charban and charunban packet out of 0x2b0e and mark that fonction
reserved for login request purpose.
(Charban and charunban now use 0x2b28 and 0x2b2a)
-Move chrif_savebankdata, chrif_datarequest, chrif_req_vipactive into
0x2b0e (as their some login operation request)
-Harmonize vip_time data type and fix some case where he would have get
INT_MAX value.
-Small revert on a3f0aedf @vip for vip_time alteration as the duration
should be able to get reduced.
-Fix vip_status(3) args of aFree 0x18E2777C is overflowed pointer
and incorect data returned, (altough dunno if we want this as returned
presentation string)
-fix bugreport:8289 where VIP_request anwser was broadcasted to all
mapserv
-Upd split_time month and year factor for a better approximation of
date. (splitting timestamp into years, month, days ...)
-Add loginif_isconnected to check if the loginserv is connected to char.
Harmonizing script_command return value

--Fix bugreport:8249 (instance_announce)
Script command need to return SCRIPT_CMD_SUCCESS (0) otherwise they
display a ShowDebug.
Stating to harmonize return value for script_command to prevent issue
hapening again.
--Fix flood message "Transforming into monster"
Tools again

--Upd doxygen version_number to github link, for easier comparaison
--Fix convert_sql calling case, now doesn't care from where perl script
is called.