Merge pull request #4465 from TheGiraffe3/bzflag

Add a topic about BZFlag

Author: kenyonj

topics/bzflag/bzflag.png

@@ -0,0 +1,9 @@
+---
+display_name: BZFlag
+logo: bzflag.png
+short_description: 3D multiplayer tank game created in 1992.
+topic: bzflag
+url: https://bzflag.org
+wikipedia_url: https://en.wikipedia.org/wiki/BZFlag
+---
+BZFlag is a 3D multiplayer tank game first made in 1992. It runs on all three major platforms and was chosen for the Google Summer of Code three times, in 2007, 2008, and 2009.