scope so that passing a NULL digest is equivalent to the Pad function
(like it used to be).  Fixes skey w/ sha1 as noticed by David Krause.

with new binutils without tweaking datasize. ok deraadt@ millert@

deals with it at startup; noticed by wilfried, millert ok

ok krw@ deraadt@

- deny access to /etc/spwd.db, permit pwd.db instead
- fixes pr 3748
- cosmetics
"toss it in" deraadt@

reorder path to place /usr/X11R6/bin before /usr/local/{bin,sbin}
sync .profile PATH with .cshrc path
ok deraadt@, millert@

From: Myk Taylor <myk@ucla.edu>

for the host byte order is when we copy the final digest (and that
is just an optimization).

man help jmc@

Use sizeof() in the Init functions where it makes sense.
Use weak aliases instead of wrapper functions.
Probably should have gone in before the major bump but as these are only
used internally by the sha2 functions themselves there should be no problem.

It was defined before and there is no need to for this knob...

OK otto@

I missed earlier.

The Pad function does padding like in Final but does not finish processing.
The FileChunk function creates a digest from a portion of a file.
Also made the length parameters consistent (and size_t).

Also make the open functions take a mode_t, not int.  OK deraadt@

ok deraadt@ millert@

the tree was stable. No point in code supporting a company which screws
its employees being in the OpenBSD tree.

handle a few subtle details caught by the regression tests: correct
termination, non copying if buffer length == 0, errno setting.
let all former users of __strerror go through strerror_r.
Work by Todd Miller and I. Okay millert@.