dig.SPF does not recurse includes/redirects

[rallytime]

The SPF function has a bug in it concerning when a domain is redirecting the SPF ipv4 range. See #10366 for more info. A test illustrating this problem is here: https://github.com/saltstack/salt/blob/develop/tests/unit/modules/dig_test.py#L81

Here is a test case for a SPF that does not redir and works as expected:
https://github.com/saltstack/salt/blob/develop/tests/unit/modules/dig_test.py#L67

[terminalmage]

Thanks for doing the legwork with the test, and thanks for reporting this, we'll take care of it.

[rallytime]

Thanks y'all!