fixed text

doc/ssh/README.md

@@ -72,8 +72,7 @@ access can happen through being a direct member of the project, or through
 a group. See `def accessible_deploy_keys` in `app/models/user.rb` for more
 information.
 
-Deploy keys are added by project. It is not possible yet to have default 
-or global deploy keys.
+Deploy keys can be shared between projects, you just need to add them to each project.
 
 ## Applications