fix: do not lowercase uid/email

ldap/ldap.go

@@ -142,9 +142,9 @@ func search(w ldap.ResponseWriter, m *ldap.Message) {
 		fmt.Println(err)
 	}
 
-	e := ldap.NewSearchResultEntry(strings.ToLower(username))
+	e := ldap.NewSearchResultEntry(username)
-	e.AddAttribute("uid", message.AttributeValue(strings.ToLower(username)))
+	e.AddAttribute("uid", message.AttributeValue(username))
-	e.AddAttribute("mail", message.AttributeValue(strings.ToLower(email)))
+	e.AddAttribute("mail", message.AttributeValue(email))
 	w.Write(e)
 }