Upgrade OpenSSH to 7.3p1.This is the last version of OpenSSH which does not break compatibilitymore than we can live with in a stable branch. Further commits willfollow to backport some bug fixes from newer versions.The sshd breakage in the previous attempt was due to an upstream bug(a 0 was changed to a 1 while refactoring send_rexec_state() in sshd.c)which only manifested itself when sshd was built with SSH 1 support.Approved by: re@
Upgrade OpenSSH to 7.3p1.This is the last version of OpenSSH which does not break compatibilitymore than we can live with in a stable branch. Further commits willfollow to backport some bug fixes from newer versions.Approved by: re@
Vendor import of OpenSSH 7.3p1.