Change Y1 references to "development".
Mention more build/run time dependencies.
Fix xfrin sentence.
Add xfrin and xfrout info (needs a lot more).
Change and add some ./configure options.
Comment out broken example.

Jelte reviewed and commented via jabber.


git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1773 e5f2f494-b856-4b98-b285-d166d9295462