teach PortGen to not use MODPY_VERSION = ${MODPY_DEFAULT_VERSION_3}

[Yifei Zhan]

Hi,

At the moment portgen will add 

  `MODPY_VERSION = ${MODPY_DEFAULT_VERSION_3}` 

to new python3 port's Makefile by default, which seems to be outdated.

The following patch stop that from happening.

comment? feedback?

Index: infrastructure/lib/OpenBSD/PortGen/Port/PyPI.pm
===================================================================
RCS file: /cvs/ports/infrastructure/lib/OpenBSD/PortGen/Port/PyPI.pm,v
retrieving revision 1.19
diff -u -r1.19 PyPI.pm
--- infrastructure/lib/OpenBSD/PortGen/Port/PyPI.pm     30 Apr 2020 23:04:48 
-0000      1.19
+++ infrastructure/lib/OpenBSD/PortGen/Port/PyPI.pm     14 Aug 2021 11:48:17 
-0000
@@ -119,7 +119,7 @@
                $self->{reset_values}{MODPY_VERSION} = 1;
                $self->set_other( 'FLAVORS', "python$_" ) for @versions;
                $self->set_other( 'FLAVOR', "python$versions[-1]" );
-       } elsif ( @versions && $versions[0] != 2 ) {
+       } elsif ( @versions && $versions[0] != 2 && $versions[0] != 3 ) {
                $self->{reset_values}{$_} = 1 for qw( FLAVORS FLAVOR );
                $self->set_other(
                        MODPY_VERSION => "\${MODPY_DEFAULT_VERSION_$_}" )