APACHE_XLATE, when doing translation that isn't single-byte-only

APACHE_XLATE, when doing translation that isn't single-byte-only

We must zap the Content-length header (if any).  Otherwise, the
browser will be seriously confused :)  The header is zapped in
ap_set_keepalive() right before we look for Content-length, transfer
encoding, HTTP level, etc. to decide, among other issues, whether or
not to turn on chunked encoding.  For HTTP 1.1, if we don't send
Content-length, we need to use chunked encoding, so we have to zap
the header before that decision.

Interestingly, in Russian Apache the Content-length header is
zapped after ap_set_keepalive() is called, so with HTTP 1.1 they
break the content-length-or-chunked rule.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85379 13f79535-47bb-0310-9956-ffa450edef68