Clean up the running mess that is r64866, r65040, and then r67277. Implement and...

Clean up the running mess that is r64866, r65040, and then r67277.  Implement and document consistent behaviour for all types of fields: if the 'name' parameter is specified, use it exactly as is, otherwise use "wp{$fieldname}".  For hidden fields added with addHiddenField(), continue to use either $attrib['name'] or $name, both unaltered.