New Rule: Active URL

[CSenshi]

Rule Name: ActiveURL

Rule Description:
The field under validation must have a valid A or AAAA record

Rule Usage Example:

reqs = {'data' : 'facebook.com'}
rule = {'data' : 'active_url'}
validate(reqs, rule) # True

reqs = {'data' : 'some.random.url.com'}
rule = {'data' : 'active_url'}
validate(reqs, rule) # False

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Before contributing please review RULES.md (check for duplication), also check CONTRIBUTING.md for more details 💯

[CSenshi]

Useful link: https://www.tutorialspoint.com/python_network_programming/python_dns_look_up.htm