Auto detect calling plugin in sampgdk_process_timers()
Auto detect calling plugin in sampgdk_process_timers()

Process only those timers that belong to the calling plugin using same
techniques as in sampgdk_init(). This avoid extra overhead when running
many plugins at once.

WopsS/sampgdk,Zeex/sampgdk,WopsS/sampgdk,Zeex/sampgdk,Zeex/sampgdk,WopsS/sampgdk