Support connect aborted

[cmebarrow]

Currently there is no way to verify (assert) that a connection fails. This ticket is an enhancement request to support syntax connect aborted in the same spirit as write aborted, as in the following example:

connect "nukleus://server/streams/client"
        option nukleus:route ${newRouteRef}
        option nukleus:transmission "duplex"
        option nukleus:authorization 0x0002_000000000000L
        option nukleus:window 8192
connect aborted

[jfallows]

May also need accepted abort.

[jfallows]

Workaround using transmission simplex and connected write aborted.

accept ...
    option nukleus:transmission "simplex"

accepted
connected
read abort

connect ...
    option nukleus:transmission "simplex"
connected
write aborted

Note: when this feature is implemented, the workaround may no longer be viable as simplex connect failure would yield connect aborted instead of connected write aborted.