Simplify log paths with junction/channel

* Remove two-pass gomplate template for unique ports and replace with simpler junction/channel syntax

package/etc/conf.d/log_paths/p_rfc3164-juniper_netscreen.conf.tmpl

@@ -3,16 +3,20 @@
 {{- $context := dict "port_id" "JUNIPER_NETSCREEN" "parser" "common" }}
 {{- tmpl.Exec "t/source_network.t" $context }}
 
-{{- /* The following is an inline template to generate the actual log path */}}
-{{- define "log_path"}}
 log {
-{{- if eq (.) "yes"}}
-    source(s_DEFAULT);
-    filter(f_juniper_netscreen);
-{{- end}}
-{{- if eq (.) "no"}}
-    source (s_JUNIPER_NETSCREEN);
+    junction {
+	    channel {
+            source (s_DEFAULT);
+            filter(f_juniper_netscreen);
+            flags(final);
+        };
+{{- if or (or (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_TCP_PORT")) (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_UDP_PORT"))) (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_TLS_PORT")) }}
+	    channel {
+            source (s_JUNIPER_NETSCREEN);
+            flags (final);
+	    };
 {{- end}}
+    };
 
     rewrite {
         set("juniper_netscreen", value("fields.sc4s_vendor_product"));
@@ -31,13 +35,4 @@ log {
 {{- end}}
 
     flags(flow-control,final);
-};
-{{- end}}
-
-{{- if or (or (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_TCP_PORT")) (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_UDP_PORT"))) (getenv  (print "SC4S_LISTEN_JUNIPER_NETSCREEN_TLS_PORT")) }}
-# Listen on the specified dedicated port(s) for JUNIPER_NETSCREEN traffic
-{{ tmpl.Exec "log_path" "no" }}
-{{- end }}
-
-# Listen on the default port (typically 514) for JUNIPER_NETSCREEN traffic
-{{ tmpl.Exec "log_path" "yes" }}
+};