Stop compressing if we are doing a HEAD request and the content-length filter
can't determine the content-length anyway.

Submitted by: Ruediger Pluem

Submitted by: sf
Reviewed/backported by: jim



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    do not work for CGI, because headers_out are not populated. We need to use
    err_headers_out instead in this case. In trunk this is handled by ap_expr().
    Joe recently added fall back to err_headers_out to ap_expr and the proposed
    mod_filter patch is analogous to Joe's fix.
    The patch fixes the test suite failure for t/modules/filter.t.
    Trunk patch: http://svn.apache.org/viewvc?view=revision&revision=1090234
    2.2.x patch: http://people.apache.org/~rjung/patches/mod_filter-cgi-err_headers_out.patch
    +1: rjung, jorton, sf




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Translated by: Nilgün Belma Bugüner <nilgun belgeler.org>
Reviewed by:  Orhan Berent <berent belgeler.org>

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location.


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document implicit limitation in AllowOverride Option=Foo -- this doesn't let you
"lock in" any value since the non +/- syntax can zap whatever it wants.




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(thanks Tom Browder on users@ for pointing out this is useful in trunk
docs but missing from 2.2).


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Translated by: Nilgün Belma Bugüner <nilgun belgeler.org>
Reviewed by:  Orhan Berent <berent belgeler.org>

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TraceEnable is per-virtualhost, not just per-server.




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