set ssl cert <filename> <payload>
This command is part of a transaction system, the "commit ssl cert" and
"abort ssl cert" commands could be required.
+ This whole transaction system works on any certificate displayed by the
+ "show ssl cert" command, that is only frontend certificates for now.
If there is no on-going transaction, it will duplicate the certificate
<filename> in memory to a temporary transaction, then update this
transaction with the PEM file in the payload. If a transaction exists with