+#################################################################################
+#
+# listen-address: Tags the request with the listen-address on which the request
+# came in.
+#
+#################################################################################
+CLIENT-HEADER-TAGGER: listen-address Tags the request with the listen-address on which the request came in.
+
+s@^\w*\s+.*\s+HTTP/\d\.\d\s*@LISTEN-ADDRESS: $listen-address@D
+