REGTESTS: http-rules: test the run-time ACL and map update actions

REGTESTS: http-rules: test the run-time ACL and map update actions

The add-acl, del-acl, set-map and del-map actions were not covered at
all, nor were the "file@", "opt@" and "virt@" name formats described in
section 2.7.

The test adds and removes entries from one request and observes them
from the next one, on an ACL loaded from a regular file and on three
maps designated respectively by a plain file name, by the same name
prefixed with "file@" to verify that both reference the same list, by
"virt@" which has no file at all, and by "opt@" pointing at a file which
does not exist. It also checks that updating an existing key replaces
its value instead of duplicating the entry, that the set-map action is
usable from the http-after-response rule set, and that the resulting
lists are visible from "show acl" and "show map".