I know that the following patch really requires some work to review, but it is missing only one vote and it would be really worth to be included in 2.2.9:
* mod_proxy: Allow for keepalive backend proxies (PR43238), which also
addresses PR44026 and PR44543. These are pretty much interwrapped here.
Trunk version of patch:
http://svn.apache.org/viewvc?view=rev&revision=602542
http://svn.apache.org/viewvc?view=rev&revision=603237
http://svn.apache.org/viewvc?view=rev&revision=603502
http://svn.apache.org/viewvc?view=rev&revision=603543
http://svn.apache.org/viewvc?view=rev&revision=604447
http://svn.apache.org/viewvc?view=rev&revision=604449
http://svn.apache.org/viewvc?view=rev&revision=605314
http://svn.apache.org/viewvc?view=rev&revision=605838
Backport version for 2.2.x of patch:
http://people.apache.org/~rpluem/patches/proxy-ssl-44026-patch.txt
+1: jim, rpluem
Regards
Rüdiger
