Create what-is-foss.md

Author: KatieTheDev

src/what-is-foss.md

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+# What is FOSS?
+
+For the purposes of this wiki and for r/FOSSdroid, FOSS apps must:
+- Have a FOSS license\*
+- Be open source
+- Be free, as in freedom
+
+They must not:
+- Have a proprietary EULA\*\*
+
+\*A FOSS license is any typical open-source license. Common examples:
+- GPLv3
+- GPLv2
+- Apache 2.0
+- Mozilla MPL
+- And many more
+*The above section needs work, and should be updated to include more FOSS licenses.*
+
+\*\*A proprietary EULA:
+- Is listed as an End User License Agreement, or
+- Has provisions typical of proprietary software, or
+- Removes one of the [FOSS freedoms](https://www.gnu.org/philosophy/free-sw.en.html)
+
+## What are the FOSS Freedoms?
+As used by the GNU project, the FOSS freedoms require that users can do the following: 
+- Run
+- Copy
+- Distrubute
+- Study
+- Change, or
+- Improve
+
+Anything that violates *any of these rights* is enough to be no longer considered FOSS.
+
+Luckily, there's a simple way to tell! If it's on F-Droid by default, it's FOSS enough for us. If it has one of the above mentioned FOSS licenses, it is too.