Implements a colored background if bind fails to load the zone due to errors
Implements a status text if errors occured
Implements not removing a zone if errors occur. instead old zone stays loaded

- need to have the pecl idn and intl modules installed
  or
- have the idna_convert class in the classes/idn/ path

Fixed/Implemented: replaced intval() by $app->functions->intval() in all interface functions due to big number problem in intval()

- Implemented: FS#1935 - Add minimum allowed seconds Value for DNS zone records

disable this while I work to clean up the validators, some forms have regex for existing validators. I should add some notes to the Coding Guidelines about this.

Validate DNS notify host. Customers were putting email addresses in there. Testing for IP addresses.

- Changed mbox regex in dns manager.

Added a server module for clients and a mail plugin.

- improved several functions in site module
- added server classes to restart services