ccheck.sh now sports a new '-sec' option to focus on security-related
configurables.
This uses P4D's built-in categorization of changes accessible via
'p4 configure help', and limits processing to scan only for those
configurables tagged with Security.
Also if '-sec' is used, the P4PORT is checked to verify that it is
SSL-enabled. This check can be skipped if '-no_ssl' is also provided.