QM_MALLOC: add a new MI memory scanning function

	* "shm_check" now performs a full scan and stops OpenSIPS if any
		inconsistency is found
	* only available with DBG_QM_MALLOC
QM_MALLOC: proper fragment debugging patterns for x86_64
change #if to #ifdef in commit 008593a3
UAC_REGISTRANT module: fixed expiration time calculation
Merge branch 'master' of https://github.com/nikbyte/opensips