Add note about openssh 2.9 changing some defaults
Add note about openssh 2.9 changing some defaults

Submitted by: Thomas.Quinot@Cuivre.FR.EU.ORG
PR: 28724

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase