adds beta.berlin.freifunk.net to playground apps

Author: adam-burns

demo/playground/domain_manager.html

@@ -84,6 +84,7 @@ <h2>Your Domains</h2>
 					<select name="domain" class="key_domain">
 						<option value="zenr.io" selected>.zenr.io</option>
 						<option value="beta.freifunk.net">.beta.freifunk.net</option>
+						<option value="beta.berlin.freifunk.net">.beta.berlin.freifunk.net</option>
 					</select>
 					<input type="submit" value="Request" class="submit"/>
 				</form>

demo/playground/play.html

@@ -245,6 +245,7 @@ <h2>Your Domains</h2>
 					<select name="domain" class="key_domain">
 						<option value="zenr.io" selected>.zenr.io</option>
 						<option value="beta.freifunk.net">.beta.freifunk.net</option>
+						<option value="beta.berlin.freifunk.net">.beta.berlin.freifunk.net</option>
 					</select>
 					<input type="submit" value="request" class="submit"/>
 				</form>