Merge r574100 from trunk:

mod_proxy_ftp: Don't segfault on bad line in FTP listing
PR 40733 [Ulf Harnhammar]


Submitted by: niq
Reviewed by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@574946 13f79535-47bb-0310-9956-ffa450edef68