In the proxy, if the cache filesystem was full, garbage_coll() was

never called, and thus the filesystem would remain full indefinitely.
We now also remove incomplete cache files left if the origin server
didn't send a Content-Length header and either the client has aborted
transfer or bwrite() to client has failed.

Submitted by: Petr Lampa
Reviewed by: Chuck Murcko, Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77743 13f79535-47bb-0310-9956-ffa450edef68