This should be zPort.

By the way it seems that the escaping of the square brackets added in d6019413681a7acd is not needed anymore i.e. it shows the escape slashes in the rendered page.

Index: althttpd.c
==================================================================
--- althttpd.c
+++ althttpd.c
@@ -2233,11 +2233,11 @@
   struct sockaddr_in6 sa6;         /* IPv6 */
   struct sockaddr_storage sas;     /* Should be the maximum of the above 3 */
 } address;
 
 /*
-** Implement an HTTP server daemon listening on port iPort.
+** Implement an HTTP server daemon listening on port zPort.
 **
 ** As new connections arrive, fork a child and let the child return
 ** out of this procedure call.  The child will handle the request.
 ** The parent never returns from this procedure.
 **