mod_proxy/3824: ErrorDocument do not override Status line set by mod_proxy

[Aidas Kasparas <ka...@soften.ktu.lt>]

>Number:         3824
>Category:       mod_proxy
>Synopsis:       ErrorDocument do not override Status line set by mod_proxy
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Wed Feb  3 10:10:00 PST 1999
>Last-Modified:
>Originator:     kaspar@soften.ktu.lt
>Organization:
apache
>Release:        1.3.4
>Environment:
AIX 4.3.2, egcs 
>Description:
Document is returned with status 500 regardless 
ErrorDocument 500 http://example.com/x.html directive in configuration file
if some document is blocked.

If I try to supply my own document for case when some site is blocked, user
document with link to my document instead of directly moved to my document.
>How-To-Repeat:
put into config:

ErrorDocument 500 http://example.com/x.html
ProxyBlock block.org

Try to get document from block.org site. You will get:
500 Proxy Error
Location: http://example.com/x.html

<Document with link to http://example.com>

Instead of 
302 Found
Location: http://example.com/x.html

<Document with link to http://example.com/x.html>
>Fix:
remove line with status_line = "500 Proxy Error" from proxy_util.c
THere might be reason to remove lines with status_line = "200 Ok" from proxy*.c
Or change part of apache core that failed to ensure corect status line will be
put into answer to client.
>Audit-Trail:
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