chisel had verify_ssl=False. Remove that, and set a sensible default
for REQUESTS_CA_BUNDLE to make it easier to run chisel on the command
line. Port the REQUESTS_CA_BUNDLE change into chisel2 as well.
This commit updates `chisel2.py` to support DNS-01 challenges. The code
required was already there, but not "wired in" to the `auth_and_issue`
function. Along the way a bug with `get_chall` raising a string instead
of an exception was fixed.
This commit also updates `test/integration-test-v2.py` with two new tests
1) issuing a certificate with a normal random domain name, and a random wildcard
domain name using DNS-01.
2) issuing a certificate with a random domain name, and in the same certificate,
a wildcard for that domain name. This tests that two authorizations are created
even though that base domain is the same.
Jacob Hoffman-Andrews
Roland Bracewell Shoemaker
Daniel McCarney