added doc patch for facebook to file in /doc/ as well

diff --git a/doc/backends/facebook.rst b/doc/backends/facebook.rst
index 94de2994ee4733fd5c78332bf6109d8e5542957f..8f38c054bf38bec196838a40de93e1cdd930f1ea 100644 (file)
--- a/doc/backends/facebook.rst
+++ b/doc/backends/facebook.rst
@@ -12,9 +12,10 @@ at `Facebook development resources`_:
       FACEBOOK_APP_ID
       FACEBOOK_API_SECRET
 
-- also it's possible to define extra permissions with::
+- Define ``FACEBOOK_EXTENDED_PERMISSIONS`` to get extra permissions from facebook.
+  NOTE: to get users' email addresses, you must request the 'email' permission::
 
-     FACEBOOK_EXTENDED_PERMISSIONS = [...]
+     FACEBOOK_EXTENDED_PERMISSIONS = ['email']
 
 - Define ``FACEBOOK_PROFILE_EXTRA_PARAMS`` to pass extra parameters to
   https://graph.facebook.com/me when gathering the user profile data, like::