QtIFW

Implement a way to start the server in debug mode and API cleanup.

1; Passing debug as first argument to the starting server does not
start the server side so the server keeps running in an endless loop.
This makes it far easier to attach a debugger.
2; API cleanup and unify init function to take port, key, and mode.
The address was never able to be changed anyway, so stop passing them
around.

Change-Id: I2a847f009ed1557a5e136e2b0006de5c62426da2
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>