MFC r250206:
Fix uninitialized warning in mps
MFC r248579:
Add missing descriptions for ZFS sysctls
MFC r245479:
Report pools which have a removed l2cache disk under zpool status -x
MFC r244194:
Fix zfs receive errors caused by snapshot replication being processed in
random order.

PR:		kern/172259
MFC r245250:
Allow perl scripts to be used in rc.d scripts

PR:		conf/117027