[Feature request]: add constant e_FPW similar way how e_SIGNUP and e_LOGIN work

[Jimmi08]

Motivation

To have the same logic / rules for 3 pages related to user registration

1. avoid the need to use SITEURL.fpw.php to get full URL
2. possibility to use customfpw.php similar way as e_LOGIN and e_SIGNUP do

Proposed Solution

replace in the redirection class and other places (shortcodes).
$this->self_exceptions = array(e_SIGNUP, SITEURL.'fpw.php', e_LOGIN, SITEURL.'membersonly.php');

set it similar way

		// login/signup
		define('e_SIGNUP', SITEURL.(file_exists(e_BASE.'customsignup.php') ? 'customsignup.php' : 'signup.php'));

		if(!defined('e_LOGIN'))
		{
			define('e_LOGIN', SITEURL.(file_exists(e_BASE.'customlogin.php') ? 'customlogin.php' : 'login.php'));
		}

Alternatives

Maybe redirection in e_module in some plugin. Not sure.

Additional Context

No response

[Jimmi08]

Not needed, solved by custom plugin. Invalid issue.