I added the 2nd argument (execpromises) to pledge(2), and then hunted

I added the 2nd argument (execpromises) to pledge(2), and then hunted
for more than a year code which could use it; but in all non-trivial
circumstances (programs which would benefit), I was stopped by issues
(in particular by environment variable behavious).  But I never looked
in ldd(1).  This is the FIRST one which is completely obvious.
spledge(NULL, "stdio rpath")
ok guenther