[openssh] (4 commits) ...6.4p1-4 + 0.9.3-1

[plautrba]

Summary of changes:

  9a031d2... try CLOCK_BOOTTIME with fallback (#1091992) (*)
  d271e02... prevent a server from skipping SSHFP lookup (#1081338) CVE- (*)
  8f8619e... ignore environment variables with embedded '=' or '\0' char (*)
  d755752... 6.4p1-4 + 0.9.3-1 (*)

(*) This commit already existed in another branch; no separate mail sent