bugfix: missing NAT settings

templates/pf.conf.j2

 
 {% if network.nat is defined %}
 {%  set natifs = [] %}
-{%  for nif in network.nat if not nif.intdevice in natifs %}
+{%  for nif in network.nat if not ("%s:%s" | format(nif.extdevice, nif.intdevice)) in natifs %}
 {%    if loop.index == 1 %}
 scrub in all
 {%    endif %}
-{%    do natifs.append(nif.intdevice) %}
+{%    do natifs.append("%s:%s" | format(nif.extdevice, nif.intdevice)) %}
 {%    if nif.ipv4 is defined %}
 {{     'nat on %s inet from %s:network to any -> (%s)' | format(nif.extdevice, nif.intdevice, nif.extdevice) }}
 {%    endif %}