Problem to add the domain in .рф zone

[itfn]

Yes, it's working, but I solve it another way :
In /var/www/ispcp/gui/include/input-checks.php search for function
_validates_tld($tld) and add to $pattern line with .рф zone

PHP Code:

$pattern =
      '@^(?:
           (?:a[cdefgilmnoqrstuwxz]|aero|asia)|
              ...
              ...
              рф|  
              ...
              ([a-z]|[a-z]{7,})
       )$@ix';