fixes pr #3998; diff from frank denis, though slightly different fix
committed;
help and ok millert@

Noticed by mepch@.  OK pedro@ and deraadt@

ok krw@ millert@

ok markus@ krw@ cloder@ millert@

ok djm@

From Peter Galbavy.

we match API's against each other, fun eh; millert ok

ok millert jmc pedro

- When malloc_abort==0 (MALLOC_OPTIONS=a), don't abort in wrterror().
fine deraadt@

long values properly so don't bother trying.  This greatly simplifies
the code.  tedu@ OK with input from otto@ and others.

using mmap(2) instead of sbrk(2).
To make a long story short, using mmap(2) in malloc(3) allows us to draw
all the benefits from our mmap(2)'s randomization feature, closing the
effort we did for returning memory blocks from random addresses.
Tested for a long time by many, thanks to them.
Go for it ! deraadt@

ok millert@

one will get implicitly cast to unsigned.  Fixes a bug with negative
minval noticed by mjc@.  Similar to a diff from miod@.  OK miod@.

Today it finally dies.  Based on a diff from Gabriel Kihlman.

To build you must:
cd /usr/src && make obj && make includes
cd lib/libc && make depend && make && NOMAN=1 sudo make install
cd /usr/src && make build

from kjell@

Now passes the regress tests.

ok pedro@, millert@

disabled.  Magne Oestlyngen.

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.

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).