salloc, sattach, sbcast, sdiag, sprio, sshare, strigger, sview, sh5util, scrun, scrontab: add pages (#11651)

pages/linux/sbcast.md

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+# sbcast
+
+> Send a file to a job's allocated nodes.
+> This command should only be used from within a Slurm batch job.
+> More information: <https://slurm.schedmd.com/sbcast.html>.
+
+- Send a file to all nodes allocated to the current job:
+
+`sbcast {{path/to/file}} {{path/to/destination}}`
+
+- Autodetect shared libraries the transmitted file depends upon and transmit them as well:
+
+`sbcast --send-libs={{yes}} {{path/to/executable}} {{path/to/destination}}`