Re: [rhinstaller/anaconda/pulls/265 master] Add few docs and improvement in check_ip_address

[dashea]

> @@ -80,6 +80,16 @@ def setup_ifcfg_log():
>      ifcfglog = logging.getLogger("ifcfg")
>
> def check_ip_address(address, version=None):
> """
> Check if the given IP address is valid in given version if set.
> :param str address: IP address for testing
> :param int version: ``4`` for IPv4, ``6`` for IPv6 or
>                    nothing if we don't care

I think it would be clearer to say something like "or None to allow either format."