Bug#822960: openssh: please consider to apply/backport upstream commit 4fb726f0fdcb155ad419913cea10dc4afd409d24
Could you please consider to apply and idealy have upstream
commit 4fb726f0fdcb155ad419913cea10dc4afd409d24 backported to
It should fix a long standing issue that cause hanging processes
when using ssh with control channel multiplexing.
E.g. as described here: