core: fix regex using servicegroup members *,service fails to expand after lookup

Fixes #3881
Parser: Allow CGIs to not fail on command CVs.

Fixes #5940
Fix: CGIs don't work on OS X

Fixes #5943
Fix comment typo in cgi/cmd.c

Signed-off-by: Michael Friedrich <Michael.Friedrich@netways.de>
Fix copyright & update docs.
Drop unused 'check_service' attribute.

Refs #5841
Bump 1.11.2