parsed_uri.port is only valid iff parsed_uri.port_str != NULL.

Old code simply checked if it was non-zero, not if it
was *valid*

PR:
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101774 13f79535-47bb-0310-9956-ffa450edef68