Expand the description of the SchedulingParameters max_sched_time
configuration parameter for greater clarity

Move start time of main scheduling loop timeout after locks are aquired.
bug 698

Quite a few recent reasons were missing from the squeue man page.

controls how frequently the main scheduling loop will execute.

limits how long the main scheduling loop can execute for

This reverts commit e2018b65.

Conflicts:

	NEWS

This reverts commit ebb3ec3c.

This reverts commit e2018b65.

Conflicts:

	NEWS

not been processed by the scheduler yet.

Modify srun to report an exit code of zero rather than nine if some tasks
exit with a return code of zero and others are killed with SIGKILL. Only an
exit code of zero did this.

The fprintf(stderr will generally fail as stderr will usually be closed.

Cache job information and drop out of loop after finding the
desired array task. This improves performance a fair bit.
bug 684

Rather than attempting a scheduling loop as frequently as every
1 second, wait 3 seconds for performance reasons.

set it in the job env otherwise the exec() fails.

Rather than immediately invoking an execution of the scheduling logic on
every event type that can enable the execution of a new job, queue its
execution. This permits faster execution of some operations, such as
modifying large counts of jobs, by executing the scheduling logic less
frequently, but still in a timely fashion.

If you have multiple partitions the output from

sinfo -o "%D %F"

would have unexpected results, hardly ever correct.

was originally testing for NULL value in one field and printing
another, which could possibly result in an invalid memory reference.

Conflicts:
	META
	NEWS

Fix logic bugs for SchedulerParameters option of max_rpc_cnt.
Scheduling would be delayed for job arrays and
backfill scheduling would be disabled unless max_rpc_cnt > 0.

on Mixed state.