Make listen port configurable about realize

[asoseil]

#38
added support for cmd --port
added the port detection in bindata

Awesome quick response. However, the new build now returns bin data on http request:

1002)~ % curl -i https://USER:PASS@MYDOMAIN
HTTP/1.1 200 OK
Content-Length: 421
Content-Type: text/html; charset=utf-8
Date: Wed, 21 Dec 2016 02:09:54 GMT
Vary: Accept-Encoding

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                                                                                                                  c�+c��f9xQ^���/ � ��g�"�gg��
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