MFC r259276,259468-259470,259472,259474,259476-259478,259480-259481,259570,

MFC r259276,259468-259470,259472,259474,259476-259478,259480-259481,259570,
259572, and 259597-259598...

r259276: Fix bug in `services' script in adding dumpdev comment to rc.conf
r259468: Ignore spurious escape generated by VMware's Ctrl-Cmd combination
r259469: Mask errors in `config' script from newaliases(1) about non-FQHN
r259470: Set atime=on for /var/mail zfsboot dataset to support mail server
r259472: Accept NULL input for zfsboot SWAP to indicate SWAP of zero bytes
r259474: Multiple changes, including bug-fixes and debugging improvements
r259476: Change default ZFS disk layout, making it easier to resize
r259477: fletcher4 is now the default (zfsboot related)
r259478: De-uglify the geli(8)-setup infobox (zfsboot related)
r259480: Fix ghosted zroot issue by always performing labelclear on swap
r259481: Auto-enable 4k sector alignmet when geli(8) is enabled (zfsboot)
r259570: Fix numerical comparison error (zfsboot)
r259572: Mask spurious rm error in bsdinstall_log from `auto' script
r259597: Fix zfsboot regression when installing to 3+ disks
r259598: Set cachefile property of bootpool so it imports to new system

git-svn-id: svn://svn.freebsd.org/base/stable/10@259621 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f