Simplify the complexity by using a common proxy_ftp_command() routine.

Strip the ";type=X" suffix from the header generated in dir listings.
Set type to ASCII for directory listings. Use common get_PWD() routine.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93098 13f79535-47bb-0310-9956-ffa450edef68