* Add dns provider duckdns see http://www.duckdns.org/spec.jsp for more info
* Add DNS challenge provider 'exec' (#508)
As discussed in #505, this commits adds a very simple DNS provider which
calls out to an external program which must then add or remove the DNS
record.
* Update duckdns to support caddy, and cleanup some comments
As discussed in #505, this commits adds a very simple DNS provider which
calls out to an external program which must then add or remove the DNS
record.
* Add otc provider.
* Added tests for provider otc.
* Format dns_providers
* fix getZoneId
* Add for tests for provider otc.
* Add proxy to transport in otc provider.
* Use DefaultTransport in otc provider.
* Make loginRequest private in provider otc.
* better error handling in provider otc.
* add more tests for provider otc.
