Update Redis license

Author: Thibaut

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -197,9 +197,9 @@ credits = [
     'http://docs.python.org/3/license.html'
   ], [
     'Redis',
-    '2006-2014 Salvatore Sanfilippo and others',
-    'BSD',
-    'https://raw.github.com/antirez/redis/unstable/COPYING'
+    '2009-2014 Salvatore Sanfilippo',
+    'CC BY-SA',
+    'http://creativecommons.org/licenses/by-sa/4.0/'
   ], [
     'Ruby',
     '1993-2014 Yukihiro Matsumoto',

lib/docs/scrapers/redis.rb

@@ -12,8 +12,8 @@ class Redis < UrlScraper
     options[:follow_links] = ->(filter) { filter.root_page? }
 
     options[:attribution] = <<-HTML
-      &copy; 2006&ndash;2014 Salvatore Sanfilippo and others<br>
-      Licensed under the three clause BSD license.
+      &copy; 2009&ndash;2014 Salvatore Sanfilippo<br>
+      Licensed under the Creative Commons Attribution-ShareAlike License 4.0.
     HTML
   end
 end