Log Message:
Use more safely the various buffers in postauth.c so that at least it
doesn't crash on common configuration.  Fixes PR 24982 by Gary Duzan.

Also, silently try to delete the configuration directory not to wipe the
user's configuration when updating the package.

Finally, mark this package as NetBSD and SunOS only, since it will fail
on other platforms by lack of default configuration.

Bump PKGREVISION.