[MEDIUM] acl: support '-i' to ignore case when matching

Implemented the "-i" option on ACLs to state that the matching
will have to be performed for all patterns ignoring case. The
usage is :

   acl <aclname> <aclsubject> -i pattern1 ...

If a pattern must begin with "-", either it must not be the first one,
or the "--" option should be specified first.
3 files changed