SSTP support for NetworkManager

This requires the Linux SSTP client installed 
http://sstp-client.sourceforge.net/

This project was a clone based on the network-manager-pptp project. Thanks to the 
authors of network-manager-pptp for their time and dedication.

network-manager-pptp - 0.7.x version:
(C) 2008 Dan Williams <dcbw@redhat.com>, and Tambet Ingo <tambet@gmail.com>

network-manager-pptp - 0.6.x version:
(C) 2005 - 2007 Antony Mee   http://www.students.ncl.ac.uk/a.j.mee
Based entirely on OpenVPN support by Tim Niemueller http://www.niemueller.de


Theory of operation
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This is a plugin to NetworkManager project, and will enable the capability of configure, start and stop a SSTP connection using sstp-client to connect to your remote workplace.


Attention Debian Users:
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Debian/Ubuntu users can now use my personal PPA to download and install the network-manager-sstp and sstp-client project via launchpad. 

You can import the gpg key using the following command: 
	sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 61FF9694161CE595 

Put the following two lines into the following file: /etc/apt/sources.list.d/sstp-client.list 
	deb http://ppa.launchpad.net/eivnaes/network-manager-sstp/ubuntu xenial main
	deb-src http://ppa.launchpad.net/eivnaes/network-manager-sstp/ubuntu xenial main

Then use your apt-get command to get both network-manager-sstp and sstp-client.