Remote-SSH connection fails when the generated VS Code host alias is long (“ControlPath too long”)
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Description
The VS Code host alias generated for Coder workspaces can be very long. This pushes OpenSSH’s ControlPath over its 108-byte limit, and the connection fails with:
`ControlPath too long ('/home//.ssh/master-@:22' >= 108 bytes)`
`ssh child died, shutting down`
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