We no longer have two doc systems, move sphinx_doc_src back to doc_src

doc_src/cmds/disown.rst

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+.. _cmd-disown:
+
+disown - remove a process from the list of jobs
+===============================================
+
+Synopsis
+--------
+
+::
+
+    disown [ PID ... ]
+
+Description
+-----------
+
+``disown`` removes the specified :ref:`job <syntax-job-control>` from the list of jobs. The job itself continues to exist, but fish does not keep track of it any longer.
+
+Jobs in the list of jobs are sent a hang-up signal when fish terminates, which usually causes the job to terminate; ``disown`` allows these processes to continue regardless.
+
+If no process is specified, the most recently-used job is removed (like :ref:`bg <cmd-bg>` and :ref:`fg <cmd-fg>`).  If one or more PIDs are specified, jobs with the specified process IDs are removed from the job list. Invalid jobs are ignored and a warning is printed.
+
+If a job is stopped, it is sent a signal to continue running, and a warning is printed. It is not possible to use the ``bg`` builtin to continue a job once it has been disowned.
+
+``disown`` returns 0 if all specified jobs were disowned successfully, and 1 if any problems were encountered.
+
+Example
+-------
+
+``firefox &; disown`` will start the Firefox web browser in the background and remove it from the job list, meaning it will not be closed when the fish process is closed.
+
+``disown (jobs -p)`` removes all :ref:`jobs <cmd-jobs>` from the job list without terminating them.