Ported to 2.2 (also attached to PR);
http://people.apache.org/~wrowe/protocol_headers_copy.patch
+1: wrowe, minfrin
+ rpluem says: The patch fails to compile:
+protocol.c: In function `ap_set_sub_req_protocol':
+protocol.c:1091: error: too many arguments to function `strip_headers_request_body'
+make[2]: *** [protocol.lo] Error 1
+make[1]: *** [all-recursive] Error 1
+make: *** [all-recursive] Error 1
+
+ Once this is fixed I am +1.
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