Place to put new function to use in all projects

[coypu at sdf.org]

hi folks,

I would feel much better if there was xorg_secure_getenv wrapper, and
did a global s/getenv/xorg_secure_getenv/g, instead of auditing them
individually.

This requires introducing it in somewhere globally convenient. what's
the right place?

(If I do this can I bump the minimum version of all the users so I can
use it right away?)

thanks.