accept timeout

[johnn-nc]

There is a server flag −QueryConnectTimeout which will reject a connection if not answered in the timout period.
I would love a flag that reversed that so that the connection is accepted if not rejected in the requested time.
The use case is a shared machine. If one person is using it, They may not want to share, but if no one is using it, it should accept a new connection.
I can look at suggesting a fix, but have a limited testing environment