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#2303
The previous versions didn't wait for the sign server to start before performing instance registration. This issue has been fixed now.
It also supports the automatic registration feature of the current version of the sign server, thereby avoiding the situation where the program has to be restarted to re-register instances after the sign server crashes.
add functions in cmd/gocq/login.go:
The functions listenPort, dailPort, and waitForConnection use net.Dial to check if the sign server is running every five seconds. They will remain blocked until the sign server is started.