modified README.md for configurable Usertable Fields

Author: nik2208

README.md

@@ -674,6 +674,9 @@ You can tune the middleware behavior using middleware specific configuration par
 - "dbAuth.usernameColumn": The users table column that holds usernames ("username")
 - "dbAuth.passwordColumn": The users table column that holds passwords ("password")
 - "dbAuth.returnedColumns": The columns returned on successful login, empty means 'all' ("")
+- "dbAuth.usernameFormField": The name of the property used as username request field, empty means 'username' ("")
+- "dbAuth.passwordFormField": The name of the property used as password request field, empty means 'password' ("")
+- "dbAuth.newPasswordFormField": The name of the property used as newPassword request field, empty means 'newPassword' ("")
 - "dbAuth.registerUser": JSON user data (or "1") in case you want the /register endpoint enabled ("")
 - "dbAuth.passwordLength": Minimum length that the password must have ("12")
 - "dbAuth.sessionName": The name of the PHP session that is started ("")