[TASK] Require at least 6 and less then 31 chars for username

extensions/t3omy/Configuration/TypoScript/femanager.txt

@@ -15,6 +15,8 @@ plugin.tx_femanager {
                 uniqueInLdap = 1
                 notInOldUserTable = 1
                 lowerChars = 1
+                min = 6
+                max = 30
             }
             password {
                 min = 12