How to configure ipv6 in `socket_options` ?

[iagocavalcante]

Found this issue when I try to deploy an Elixir/Phoenix API using MyXQL in a mysql database already in use for others APIs at fly. So I have some issues when deploy and I guess it because the socket_options used in the runtime.

I clone this repo and made some tests, I can connect without socket_options locally but when I try to configure it I see some errors, first one is related to expected a keyword:

{:ok, pid} = MyXQL.start_link(username: "root", password: "testpassword", hostname: "localhost", port: 3306, socket_options: [:inet6])

Then I tried put [inet6: :inet6] and thats the output:

Im trying to figure out how to connect using ipv6 with MyXQL, without socket_options works as expected

[josevalim]

Yeah, socket_options is not a keyword, so we should concat instead of merging.

[wojtekmach]

Fixed in #183.