All; I've had the patch for SSLProxyMachineCertificateChainFile added to the 2.2 STATUS for a while. There hasn't been much movement so I wanted to reach out to see if some fellow committers could spare the time to help push it along. Or - on the flip side - if folks do not think it is worth pursuing, I can nyx it from the STATUS file. Timing wasn't the best as a lot of us were focused on 2.3 -> 2.4 at the time.
FWIW, I have been using this update in production environments since it was proposed. Cheers -- Daniel Ruggeri