Make clear that contributing code to the Redis project means to relea…

…se it under the terms of the BSD license.

CONTRIBUTING

@@ -1,3 +1,9 @@
+Note: by contributing code to the Redis project in any form, including sending
+a pull request via Github, a code fragment or patch via private email or
+public discussion groups, you agree to release your code under the terms
+of the BSD license that you can find in the COPYING file included in the Redis
+source distribution.
+
 # IMPORTANT: HOW TO USE REDIS GITHUB ISSUES
 
 * Github issues SHOULD ONLY BE USED to report bugs, and for DETAILED feature

README

@@ -128,4 +128,16 @@ system reboots.
 You'll be able to stop and start Redis using the script named
 /etc/init.d/redis_<portnumber>, for instance /etc/init.d/redis_6379.
 
+Code contributions
+---
+
+Note: by contributing code to the Redis project in any form, including sending
+a pull request via Github, a code fragment or patch via private email or
+public discussion groups, you agree to release your code under the terms
+of the BSD license that you can find in the COPYING file included in the Redis
+source distribution.
+
+Please see the CONTRIBUTING file in this source distribution for more
+information.
+
 Enjoy!