support evtimer_* evsignal_* macros
Merge branch 'master' into libevent
Merge branch 'master' into libevent
Conflicts:
	src/package-devel/Lib.Libevent/Libevent_glue.c
re-checked
fix according to comments
change to KNULL(String), KNULL(Func) from K_NULL
revise cevhttp_set_cb_common() calling sequence
Merge pull request #412 from tosnoz/libevent_evhttp

Libevent evhttp implemented