required for a corner case in dec_hash() in the following commit and also
   usually faster. dec_hash() needs some extra precision above MPD_MAX_PREC,
   and _mpd_base_ndivmod() is not audited for that.

2) Use _mpd_basemul() if the length of the smaller operand is less than
   or equal to 256. While this is technically an optimization, it is
   required for *testing* corner cases in dec_hash() in reasonable time.

This is due to an off-by-one error: the allocated buffer didn't have room for a NUL
character at the end of the mbstowcs result.

(merge with 3.2)

This is due to an off-by-one error: the allocated buffer didn't have room for a NUL
character at the end of the mbstowcs result.

This is necessary for ZFS systems, which don't support UF_IMMUTABLE.

(Note: this commit is a manual merge of 78699:019a2390b014 as both
_test_chflags_regular_file and test_lchflags_symlink differ between
3.2 and default.)

This is necessary for ZFS systems, which don't support UF_IMMUTABLE.

Patch by Ethan Furman.

Patch by Ethan Furman.

Suggestion and patch by Mike Hoy.

Suggestion and patch by Mike Hoy.

Patch by Robin Schreiber.

Patch by Robin Schreiber.

Found by Coverity.

Break up the 'someos' docs classification based on a more user-focused scheme, including creation of a separate 'Concurrent Execution' section

s/path importer/path based finder/ (because the path based finder is not an importer and the simpler 'path finder' is too ambiguous)