Reinstate proxy protocol for 5280 and add vim comment

roles/prosody/templates/prosody.cfg.lua.j2

@@ -62,7 +62,7 @@ modules_enabled = {
 }
 
 -- statistics and metrics
-http_ports = { 5280, 5282 }
+http_ports = { 5282 }
 http_interfaces = { "", "::" }
 --- The http_openmetrics module exposes the metrics gathered by this internal
 --- mechanism
@@ -84,7 +84,7 @@ s2s_ports = {5269}
 proxy_port_mappings = {
   [15222] = "c2s",
   [15269] = "s2s",
-  -- [15280] = "http"
+  [15280] = "http"
 }
 
 proxy_trusted_proxies = {
@@ -157,3 +157,5 @@ Component "conference.jabber.{{ domain }}" "muc"
 Component "proxy.jabber.{{ domain }}" "proxy65"
 
 {% endfor %}
+
+-- vim:set syntax=lua: