IPV6 EPSV support for IPV6 in FTP proxy.

Some cleanup of the million and one debug statements
PR:
Obtained from:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88842 13f79535-47bb-0310-9956-ffa450edef68

Author: minfrin