Also return 421 from non-phx2 proxies for src.fp.o

Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>

roles/httpd/reverseproxy/templates/reversepassproxy.git.conf

@@ -42,5 +42,9 @@ ProxyPreserveHost On
 	Require valid-user
 </Location>
 
+{% if 'phx2' in inventory_hostname %}
 ProxyPass {{ localpath }} {{ proxyurl }}{{remotepath}}
 ProxyPassReverse {{ localpath }} {{ proxyurl }}{{remotepath}}
+{% else %}
+Redirect 421 /
+{% endif %}