Priority/multifactor - minor logging improvements
Fix for used_cpu_run_secs bad calcuation

Add argument to priority plugin's priority_p_reconfig function to note
when the association and QOS used_cpu_run_secs field has been reset.
Without this flag, we remove time on "scontrol setdebug" or
"scontrol setdebugflag" that can result in used_cpu_run_secs
going negative or otherwise get bad values.
Correction to logic added in commit 6d7931896a9bc2bc2f4eac31b15b284e939233e9
bug 423
Updated the QOS limits documentation and man page.
Priority/multifactor - check for storage enforce

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).
update META for v2.6.4 tag
Merge branch 'slurm-2.6'

Conflicts:
	META
	src/plugins/priority/multifactor/priority_multifactor.c
Update META for v13.12.pre4 tag