Description:
------------
reopening Bug #39927 and Bug #13961 which seems to have been marked Bogus because of a Bogus reviewer.
Apache Env set by, for example:
 BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0

Is treaten in PHP to become downgrade-1_0 with an "_". that's OK, its' for security reasons.
But it is changed in Apache, and so Apache will not modify the response to make his 'forced downgrade to HTTP/1.0'.
That's REALLY BAAAD.
This breaks Apache mechanism to handle bad browser which do not understand well HTTP/1.1 (with chunked responses on bad Java soap parses for exemple).


I reedit the bug to give a workaround for people interested:
in PHP write such things:
"""
if ($_SERVER['downgrade-1_0']){
        apache_setenv('downgrade-1.0','true');
}
"""
Beware of safe mode allowed env vars if you're in safe mode.

Now you have to right behaviour $_SERVER contains only strings without dots but Apache have the right env to behave well.

Shame on PHP....

Reproduce code:
---------------
see previous bugs

Expected result:
----------------
response in HTTP/1.0

Actual result:
--------------
response in HTTP/1.1