ok millert miod pval, grumble deraadt

FreeBSD's example, a '~' in an environment variable is replaced
with the user's homedir.  A '$' is replaced by the user's login
name.  Both can be escaped with a backslash to get the literal char.
OK deraadt@

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

deraadt@ OK

Simpler licence, update copyright years, trim empty lines, ISO declarations.
okay miod@

ok pedro@, millert@

noticed by millert@

should only be 255.  You would think they would be the same but you'd be
wrong.

respectively instead of duplicating their values.

o _POSIX_CHILD_MAX increased to 25
o _POSIX2_RE_DUP_MAX renamed _POSIX_RE_DUP_MAX
o _POSIX_SYMLINK_MAX and SYMLINK_MAX added (same as PATH_MAX)
o _POSIX_SYMLOOP_MAX and SYMLOOP_MAX added (like MAXSYMLINKS)

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...

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@

functions can take a NULL buf pointer.  They will malloc memory as
needed in this case.

Add constants for buffer lengths and use them.
Make bit count 64bit based on changes by niklas@ long ago.
Conver htole32n() to macros and unroll loops.

With help from avsm@

changes Niklas made to the md5 code long ago.  OK hshoexer@

previously lived in foohl.c.  The foohl.c files are now generated
via sed, though perhaps cpp could be used in the future.
Use u_int8_t instead of unsigned char for the buffers struct fooContext.
Add constants for buffer lengths and use them in function prototypes
and the man pages.
This is basically cosmetic surgery; there should be no functional changes.
OK deraadt@

lets tendra build again.
ok deraadt@, pvalchev@, millert@

from Daniel Lucq

Allows others to build OpenBSD/cats, use binutils from devel/binutils/stable
Requested by deraadt@

u_char -> unsigned char
u_short -> unsigned short
u_long -> unsigned long
u_int -> unsigned int
okay millert@

lint gets the prototypes it expects and doesn't get confused by the
inline functions.  OK deraadt@

the KERN_PROC2 sysctl.  Based on changes from NetBSD but uses our
own kvm_arg_sysctl().

to built-ins, so eventually we will have one version of these files.
Special adjustments for the kernel to cope: machine/stdarg.h -> sys/stdarg.h
and machine/ansi.h needs to have a _BSD_VA_LIST_ for syslog* prototypes.
okay millert@, drahn@, miod@.