Update LiteSpeed SAPI code to V6.4

Conflicts:
	sapi/litespeed/lsapi_main.c
	sapi/litespeed/lsapidef.h
	sapi/litespeed/lsapilib.c
	sapi/litespeed/lsapilib.h

Conflicts:
	sapi/litespeed/lsapi_main.c
	sapi/litespeed/lsapilib.c
	sapi/litespeed/lsapilib.h
update to LSAPI 6.6

Conflicts:
	sapi/litespeed/lsapi_main.c
Do not kill children process in pre-fork mode when parent process quit.
cleanup file headers.