Custom open connection for different network types

[GilGil1]

No description provided.

[MattBrittan]

Thanks for the PR - looks good and all tests passed so I have accepted it.
A few really minor issues (decided it was not worth asking for changes before accepting this) - There are a couple of minor typos in the comments (will fix at some point in the future) and I'd suggest running gofmt before submitting PR's (not a big deal but the next commit of this file will contain a few formatting updates).

[GilGil1]

Hi Matt,
Thanks a lot,
I sent a PR #575 , if you wish to use. If not I will delete it

[MattBrittan]

Thanks @GilGil1 - I have merged this (as you changed a function name I thought it best to do that fast!).