radiocheckbox: Generate radio and checkbox inputs from MySQL data

This class can be used to generate HTML forms with radio and checkbox inputs from data retrieve from MySQL tables.

It can query a MySQL database to retrieve the list of ENUM or SET fields of a table that match a given pattern.

It can also retrieve a list of record values of a field in a table that match a given value.

The class builds a HTML form with checkbox and radio inputs based on the previously retrieved list of table fields and values.