"py-" prefix shouldn't be needed for Python-based ports that are programs, not libraries

From: Yuri <yuri_at_FreeBSD.org>
Date: Fri, 16 Feb 2024 01:57:55 UTC
I think that this section 
https://wiki.freebsd.org/Python/PortsPolicy#Prefixing_.28py-.2A.29 
should be amended:

Examples of compelling cases:

* The port is a program, and not a library.


There is no need to have flavors for Python ports that build only 
programs and don't build libraries.


Thanks,

Yuri