Config option to disable ssl verification for methods/reloaders

[matthsmi]

time="2018-09-07T19:58:50Z" level=error msg="ButlerConfig::Handler()[count=5]: Cannot retrieve butler configuration. err=Get https://foo.owns.com/butler/butler.toml: x509: certificate is valid for bar.owns.com, not foo.owns.com"
time="2018-09-07T19:58:50Z" level=error msg="ButlerConfig::Handler()[count=5]: done."
time="2018-09-07T19:58:50Z" level=warning msg="main(): Sleeping 5 seconds."