Ability to add Root-Zone Domains (for example .local / .internalnetwork)

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Trying to add (unofficial, of course) root zone domains like, for example, 
".local")
-> throws an error, reason seems to be the regexp that checks the input. my 
temp bugfix was to disable the regexp, and works like a charm as powerdns 
itself fully supports the zone.

What is the expected output? What do you see instead?
Modifying the regexp, that it accepts the input

What version of the product are you using? On what operating system?
0.3.3, newest

Please provide any additional information below.

Original issue reported on code.google.com by chrische...@gmail.com on 31 Dec 2010 at 6:15

[GoogleCodeExporter]

I also have private domains like this (".lan", ".local"). 

Original comment by Dicr.Tarasov on 24 Nov 2012 at 3:07