bind - built-in ACLs, fix version.bind, typos, esthetics

* Enable use of the built-in ACLs as per [1]. Especially 'localhost' and
  'localnets' come in handy on large firewall installations.
* Fix version.bind so that the server does not process queries at all as
  per [1], which is more secure.
* Typo with listenon: Any -> any (more or less an esthetic fix)
* Two minor indentation errors

[1] http://ftp.isc.org/isc/bind9/cur/9.9/doc/arm/Bv9ARM.ch06.html