Update docs / update recovery code command in email message

- Update docs to reflect new commands, configurations (account recovery, limbo handling) and messages
- Change message for the recovery code email to contain the new command

src/main/java/fr/xephi/authme/service/PasswordRecoveryService.java

@@ -30,9 +30,6 @@ public class PasswordRecoveryService implements Reloadable {
     @Inject
     private CommonService commonService;
 
-    @Inject
-    private RecoveryCodeService codeService;
-
     @Inject
     private DataSource dataSource;
 
@@ -129,7 +126,7 @@ public class PasswordRecoveryService implements Reloadable {
      * @param player The player to check.
      * @return True if the player is not on cooldown.
      */
-    public boolean checkEmailCooldown(Player player) {
+    private boolean checkEmailCooldown(Player player) {
         Duration waitDuration = emailCooldown.getExpiration(player.getName().toLowerCase());
         if (waitDuration.getDuration() > 0) {
             String durationText = messages.formatDuration(waitDuration);