Clean up bind commit to master, revert to vendor

[Jan Lentfer <Jan.Lentfer@xxxxxx>]

the relevant branches can be found here:
http://gitweb.dragonflybsd.org/~lentferj/dragonfly.git/shortlog/refs/heads/bind_vendorupdate
http://gitweb.dragonflybsd.org/~lentferj/dragonfly.git/shortlog/refs/heads/vendor/BIND

there was some discussion on irc about where README.DRAGONFLY and 
README.DELETED had to go.

I have left it the way I did it of vendor/LESS and as it was sugested on 
irc (README.DRAGONFLY on master, README.DELETED on vendor).

But generally this should be clarified and the consensus should make 
it's way into development(7).

Cheers,

Jan