Fixes #5126: Don't try to enforce invalid parameters on RedHat3,4,Debian3,4
Merge pull request #426 from ncharles/bug_5127/dev/fix_support_of_old_of_for_openssh

Fixes #5126: Don't try to enforce invalid parameters on RedHat3,4,Debian...
Merge branch 'branches/rudder/2.6' into branches/rudder/2.9
Merge branch 'branches/rudder/2.9' into branches/rudder/2.10
Merge branch 'branches/rudder/2.10' into branches/rudder/2.11