Allows commas in domain validator

[ccdpowell]

I receive a True response when pushing in a domain that has a comma.

EG: jgp.com,br

[ShivaShankerReddy]

@ccdpowell
I found no error when using the latest code:

d = domain("jgp.com,br")
print(d)

gives Error ValidationFailure(func=domain, args={'value': 'jgp.com,br'})

Going ahead to close the issue