MFC r298420, r298439, r298644

r298420 | asomers | 2016-04-21 10:43:15 -0600 (Thu, 21 Apr 2016) | 10 lines

Notify userspace listeners when geom disk attributes have changed

sys/geom/geom_disk.c:

disk_attr_changed(): Generate a devctl event of type GEOM:<attr> for
every call.

r298439 | asomers | 2016-04-21 15:13:41 -0600 (Thu, 21 Apr 2016) | 10 lines

DRY on buffer sizes. Update to r298420.

sys/geom/geom_disk.c:

In disk_attr_changed, don't repeat a buffer size.

r298644 | asomers | 2016-04-26 08:48:58 -0600 (Tue, 26 Apr 2016) | 8 lines

Add GEOM::physpath documentation to devd.conf(5)