LICENSE.md: copied the section from README.md

LICENSE.md

+Licence
+-------
+
+PULT is Free Software (Open Source) under the
+[ GNU Affero General Public License (AGPL) ](https://www.gnu.org/licenses/agpl-3.0.html),
+either version 3 of the licence, or, at your option, any later version.
+
+In short this means:
+
+ * You are free to run the software, for any purpose.
+
+ * You are free to study how the software works and to adopt it
+   to your needs.
+   
+   To make this possible, you have, as a user of the software,
+   the right to obtain its source code, *even if the software
+   runs on a server, and you only connect to that server*.
+   (This “even on a server” clause is what distinguishes the
+   GNU Affero GPL from the “normal” GNU GNU GPL.)
+
+ * You are free to redistribute copies of this software,
+   gratis or for a fee, *provided that you don't deny
+   anyone the rights we gave to you*.
+   (This “provided that” clause is the *Copyleft*
+   principle, an essential feature of the GNU licences.)
+   
+ * You are free to improve this software and to redistribute
+   your improvements, so everyone can benefit from them.
+
+   Again, you may do this as a charity service, but you are also
+   free to found a business providing this kind of service.
+
+ * There is NO WARRANTY, unless you are paying someone
+   to provide a warranty for you.
+
+The GNU AGPL applies to PULT itself.  Many components used by PULT
+are under different licences.  However they are all Free Software,
+and their licence conditions are essentially subsets of those of
+the GNU AGPL.
+
+A simplified list of the individual licences follows.
+For details, please examine the individual software packages.
+
+ * *Mumble* (server and client): 3-clause BSD licence
+
+ * Mumble web interface *mumble-web*: ISC licence
+
+ * Web server: *nginx*: 2-clause BSD licence,
+   or *Apache*: Apache licence 2.0
+
+ * *noVNC*: MPL 2.0
+
+ * *yesVNC*: GNU APGL 3+ (part of PULT)
+
+ * *websockify*: GNU GPL 3
+
+ * *TigerVNC*: GNU GPL 2.0
+
+ * *TightVNC*: GNU GPL 2.0+
+
+ * *x11vnc*: GNU GPL 2.0
+
+ * *ssvnc*: GNU GPL 2.0
+
+ * *OpenSSH*: 3-clause BSD licence
+
+ * *PuTTY*: MIT/Expat licence
+
+ * *Janus WebRTC Gateway*: GNU GPL 3
+
+ * *Firefox* web browser and *geckodriver*: MPL 2.0
+
+ * *Chromium* web browser and *chromedriver*: 3-clause BSD licence
+
+ * *Selenium*: Apache licence 2.0
+
+ * *Python*: PSF licence
+
+ * *Node.js*: MIT/Expat licence
+
+ * *Netcat*: 3-clause BSD licence
+
+ * *Bash*: GNU GPL 3+
+
+ * *botamusique*: MIT/Expat licence
+
+For an overview about the licences themselves, see
+[ https://www.gnu.org/licenses/license-list.html ](https://www.gnu.org/licenses/license-list.html).