security_events: log events with descriptive names

This patch updates the log messages to include descriptive
names for event types.  This is an improvement over having
only cryptic type numbers.

(closes issue ASTERISK-22909)
Reported by: outtolunc
Review: https://reviewboard.asterisk.org/r/3081/
Patches:
     svn_security_events.c.names.diff.txt uploaded by outtolunc (license 5198)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@404387 65c4cc65-6c06-0410-ace0-fbb531ad65f3