added support for client authentication via SSL
Merge branch 'master' of https://github.com/cern-mig/nagios-plugins

* 'master' of https://github.com/cern-mig/nagios-plugins:
  added support for client authentication via SSL

Conflicts:
	plugins/check_http.c
NEWS: Mention the new "check_http -J/-K" options

Closes #48.
Abbreviate function name

Make a very long function name at least a little bit shorter.