extract endlessServer to support TCP

[flier]

1. extract endlessServer to support TCP
2. improve logging with srv.EndlessListener.Addr()

[fvbock]

thanks a lot for the PR.
had no time to look at it in detail over the weekend - pls give me a little more time to do so before merging. thx...

[flier]

no problem, thanks for your effort :)

Florian von Bock notifications@github.com于2015年8月3日周一 上午9:35写道：

thanks a lot for the PR.
had no time to look at it in detail over the weekend - pls give me a
little more time to do so before merging. thx...

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#10 (comment).

[ajpen]

Might be better if you factor out the server type and the tcp server into their own files.