Reduce schedd timeout for ssh-to-job network connections. #7193
Reduce schedd timeout for ssh-to-job network connections. #7193

Restore the old timeout value of 20 seconds when the schedd connects to
the startd and starter for command GET_JOB_CONNECT_INFO (used for
ssh-to-job). The recent value of 300 exacerbates a possible deadlock
between schedd, starter, and shadow.

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