Merge pull request #465 from igalic/patch-1

simplify mac address regex

Author: DavidS

lib/puppet/parser/functions/is_mac_address.rb

@@ -15,7 +15,7 @@ module Puppet::Parser::Functions
 
     mac = arguments[0]
 
-    if /^[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}:[a-fA-F0-9]{1,2}$/.match(mac) then
+    if /^[a-f0-9]{1,2}(:[a-f0-9]{1,2}){5}$/i.match(mac) then
       return true
     else
       return false