[PATCH] Apache 2.0 Proxy & Windows Update

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Apache2 proxy seems to drop Content-Length header from replies to HEAD
requests. This is very bad for Microsoft's Windows Update system (and =
against
HTTP spec). The problem is caused by CONTENT_LENGTH output filter =
setting
Content-Length header to zero because there is no body data. Later on =
Apache
removes Content-Length header if it has value 0.

The attached patch fixes the problem in CONTENT_LENGTH output filter by
preventing it from modifying the content length of a reply to HEAD =
request.

The attached patch is against HEAD of APACHE_2_0_BRANCH as of this =
morning.

--=20
Sami Tikka, senior software engineer, F-Secure Corporation
tel: +358 9 2520 5115, fax: +358 9 2520 5015
http://www.F-Secure.com
F-Secure: Securing the Mobile Enterprise

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