Turn off socialspy on login if player doesn't have the permission.

This fixes the case where players had socialspy enabled, lost the permission for it (got demoted) and then someone had to manually check and disable it for them as described in #299.

Essentials/src/com/earth2me/essentials/EssentialsPlayerListener.java

@@ -284,6 +284,11 @@ public class EssentialsPlayerListener implements Listener {
                     user.getBase().setWalkSpeed(0.2f);
                 }
 
+                if (user.isSocialSpyEnabled() && !user.isAuthorized("essentials.socialspy")) {
+                    user.setSocialSpyEnabled(false);
+                    ess.getLogger().log(Level.INFO, "Set socialspy to false for {0} because they had it enabled without permission.", user.getName());
+                }
+
                 user.stopTransaction();
             }
         }