The remote port information was forgotten from the builtin

data of the AJP 13 protocol.  Since the servlet spec allows
to retrieve it via getRemotePort(), we provide the port to
the Tomcat connector as an additional request attribute.
Modern/future Tomcat versions know how to retrieve
the remote port from the attribute AJP_REMOTE_PORT.

See:
https://issues.apache.org/bugzilla/show_bug.cgi?id=41263
http://svn.eu.apache.org/viewvc?view=rev&revision=756926
http://svn.eu.apache.org/viewvc?view=rev&revision=757223


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@761329 13f79535-47bb-0310-9956-ffa450edef68