Support IPv6 link-local scope IDs in Listen and VirtualHost, if built with APR 1.7 or later:
* server/listen.c (match_address): New function, factored out from find_listeners. (find_listeners): Use it; add scope and temp pool arguments. (alloc_listener): Take scope_id and pool arguments and pass through; set zone for addresses if present. (ap_set_listener): Pass through temp pool and scope id.
* server/vhost.c (get_addresses): Set zone for vhost address if present.