Backport 814652, 814785

CVE-2009-3094: mod_proxy_ftp NULL pointer dereference on error paths.
Submitted by: Stefan Fritsch <sf fritsch.de>, Joe Orton


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@814844 13f79535-47bb-0310-9956-ffa450edef68