deal with non-ascii chars on hostname fields

[jsalamero@…]

hostname fields shouldn't permit non-ascii fields or deal with them somehow.

[jacalvo@…]

Currently this check is done with:

sub _checkDomainName {
        my $d = shift;
        ($d =~ /^\w/) or return undef;
        ($d =~ /\w$/) or return undef;
        ($d =~ /\.-/) and return undef;
        ($d =~ /-\./) and return undef;
        ($d =~ /\.\./) and return undef;
        ($d =~ /_/) and return undef;
        ($d =~ /^[-\.\w]+$/) or return undef;
        return 1;
}

Maybe we should replace that with libdata-validate-domain-perl:

use Data::Validate::Domain qw(is_domain);

is_domain($foo)

[jacalvo@…]

(In [19472]) NN: Validation of domain names using Data::Validate::Domain (closes #1676)