new waf vs PYTHONDIR

[Hal Murray]

> I tried to bisect the git.  No luck.  The issue depends on which Python I
> am running.

commit e899c2ffd4243e933150f2349874e4e462657c54
Author: James Browning <jamesb.fe80 at gmail.com>
Date:   Thu Mar 13 02:06:11 2025 -0700

    Use waf 2.1.4, revise, and drop Py2.6 builds.


Which python works the old way?

We now have two wafs.

lrwxrwxrwx 1 murray murray      9 Mar 13 02:24 waf -> waf-2.1.4
-rwxr-xr-x 1 murray murray 108317 Mar 13 02:24 waf-2.1.4
-rwxr-xr-x 1 murray murray 105631 Mar 13 02:24 waf-2.0.25

There is some magic that I don't know anything about that uses the old one 
if you have an old python.  Or something like that.


-- 
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