Hmm... We need to also address the fact that the response may have

Hmm... We need to also address the fact that the response may have
no Content-Length at all, but the cached info does (think 304). We
also need to update the cache file if we update/use the old c-l
value (the previously stored values are bogus).
PR:
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@96649 13f79535-47bb-0310-9956-ffa450edef68