Re: Protocol: control specifications.

[Mark Ennis <mark.ennis@adacel.com>]

I agree with Kurt that a server implementation should be flexible in 
what it receives. The criticality flag is not intended to check that 
client implementations are behaving correctly. It is a tool for clients 
 to indicate whether they wish to be informed on whether extension 
behaviour is available or not. A control specification should only be 
recommending the setting of this flag to the client implementation.

If a server supports a requested control, then the criticality flag is 
of no interest and should be ignored.

If the server supports a requested control, but the client supplies the 
control for an inappropraite operation type, it should be ignored unless 
the control specification indicates a specific action in this case.

- Mark Ennis.