mail/simscan: Update 1.4.0 => 1.4.6.2, set maintainer

Upstream changed:
https://notes.sagredo.eu/en/qmail-notes-185/installing-and-configuring-simscan-38.html

Changelogs:
https://github.com/sagredo-dev/simscan/blob/v1.4.6.2/ChangeLog

Improve port:

• Fix USERS/GROUPS.
• Fix dirs permissions in pkg-plist.
• Fix warnings from portclippy.
• Remove upstreamed patch.

PR: 287915
Co-authored-by: Bedreddin Sahbaz <bedreddinsahbaz@gmail.com> (new maintainer)
MFH: 2025Q3