task/cgroup: notify if memory.memsw.failcnt > 0. indicates oom

Thanks Ryan, this looks correct.

a common structure instead of multiple parameters to the function.

Hopefully this makes adding new options easier.

Conflicts:
	doc/man/man5/slurmdbd.conf.5

Match that of other tests

Correction to hostlist parsing bug introduced in v2.6.4 for hostlists with
more than one numeric range in brackets (e.g. rack[0-3]_blade[0-63]").
bug505

Clear a job's core specialization option in select plugins that
we do not want to support the option (e.g. bluegene, alps, linear,
and serial). Only support it in cons_res and cray plugins (not yet
coded though).

Also correct test ID to be of the form #.#

Rather than directly referencing the individual headers in
src/common

plugin: rank map_cpu mask_cpu rank_ldom map_ldom mask_ldom boards.
All these options except "boards" are currently supported by
task/affinity. "boards" is a new option not previously supported.

Just a start for now

Conflicts:
	NEWS

Conflicts:
	META
	src/plugins/priority/multifactor/priority_multifactor.c

Avoid decrementing grp_used_cpu_run_secs if we are not enforcing
accounting limits. Without this change, the plugin will decrement
times from zero cpu used times (i.e decrement an uninitialized
variable).