Merge r258478, r258479, r258480, r259719: fixes related to mass source
nodes removal.

PR:		176763
Merge r258702: Fix some misinformation in netgraph manual pages.
Merge r259855:  We have in base iconv.

PR:		185135
Merge r260046:  Fix the parse type for NGM_LISTTYPES.
Merge r260377: fix panic on pf_get_translation() failure.

PR:		182557