Log Message:
shells/es: configury fixes

Instead of patching in an increasingly long list of OSes to avoid
redefining <stdlib.h> functions on, just use #if 0. Should fix the
Solaris build.

While here, don't hardcode the traditional wait status encoding; it's
no longer necessary to work around union wait and baking it in
violates portability rules.

PKGREVISION -> 5