Double comma in postfix master configuration file at smtpd_helo_restrictions

Summary

When master.cf for postfix is created/written by the update or install script the line

smtpd_helo_restrictions

will have a double comma after

regexp:{config_dir}/blacklist_helo

Steps to reproduce

1. Running ispconfig_update

Correct behaviour

There should not be a double comma.

Environment

Server OS + version: Debian 12
ISPConfig version: 3.2.12

Proposed fix

I will create a merge request.

References

Check about line 1200 in file

install/lib/installer_base.lib.php