Only two of the *rand48.c files need <math.h>, so just #include it in them

Move the __rand48_* declarations into rand48.h, and then hide both them
and __dorand48() and __rand48_deterministic

ok deraadt@

random seed buffer must be unsigned

Change rand(), random(), drand48(), lrand48(), mrand48(), and srand48()
to returning strong random by default, source from arc4random(3).
Parameters to the seeding functions are ignored, and the subsystems remain
in strong random mode. If you wish the standardized deterministic mode,
call srand_deterministic(), srandom_determistic(), srand48_deterministic(),
seed48_deterministic() or lcong48_deterministic() instead.
The re-entrant functions rand_r(), erand48(), nrand48(), jrand48() are
unaffected by this change and remain in deterministic mode (for now).

Verified as a good roadmap forward by auditing 8800 pieces of software.
Roughly 60 pieces of software will need adaptation to request the
deterministic mode.

Violates POSIX and C89, which violate best practice in this century.
ok guenther tedu millert

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

branches: 1.1.1;
Initial revision