Update to r39206:
- ipv6_enable is deprecated; use ip6_prefer instead.
- ipv6_ifconfig_{interface} is deprecated in favor of
  ifconfig_{interface}_ipv6; additionally, the latter requires the
  specification of 'inet6'.

Submitted by:	Bjoern Heidotting
Obtained from:	The FreeBSD German Documentation Project


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45553 c2e8774f-c49f-e111-b436-862b2bbc8956
Update to r38790:
Indicate that the interface is appended to the filename.

Submitted by:	Bjoern Heidotting
Obtained from:	The FreeBSD German Documentation Project


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45554 c2e8774f-c49f-e111-b436-862b2bbc8956