notify-via-isms: + sign in phone number not compatible with all gateways

[kucert]

My solution:

# replace + by 00 and delete whitespaces
my $phone = $p{CONTACTPAGER};
$phone =~ s/\s+//g;
$phone =~ s/\+/00/g;

And use $phone instead of $p{CONTACTPAGER} for sending