bug where we were using the byterange filter to filter an error, which
caused us to close the connection before we had sent any data.  Currently,
we only keep the three most important filters, but we may need to add more
in the future.  I am mostly thinking of the charset translation filter.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87854 13f79535-47bb-0310-9956-ffa450edef68