MEDIUM: acl: Change the acl register struct

MEDIUM: acl: Change the acl register struct

This patch replace a lot of pointeur by pattern matching identifier. If
the declared ACL use all the predefined pattern matching functions, the
register function gets the functions provided by "pattern.c" and
identified by the PAT_LATCH_*.

In the case of the acl uses his own functions, they can be declared, and
the acl registration doesn't change it.