Merge r1301111 from trunk:

mod_dumpio: Return an error code from a previous input filter

PR: 52914
Submitted by: sf
Reviewed by: rjung, trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1373352 13f79535-47bb-0310-9956-ffa450edef68