Prototype ledcontrol().
Check for internal HP-IB in SYSFLAG much earlier (i.e. before the MMU
is turned on).
General cleanup:
	- make a prototyping sweep
	- do some garbage collection
	- always print the status of enabling memory parity checking
Still some more to do.
Changes from file-3.21
minimal pci support
Minimal bus.h. Together with the minimal pci implementation, we have just
enough functionality to find a VGA card....
Will be expanded when I buy more pci-cards ;-)
minor copyright update.
update for kern/sa lib Makefile.inc changes.
minor copyright update.
Fix kernel crash dumps.  Still uses the old format for now.
Nuke __BDEVSW_DUMP_OLD_TYPE.
Serial console changes:
* Enable FIFO with trigger level 1.
* Set DTR and RTS so terminals are happy.
* Do not set IEN.
Serial console changes:
* Enable FIFO with trigger level 1.
* Set DTR and RTS so terminals are happy.
If we get a RXRDY interrupt, but RXRDY is not set in the LSR, briefly set IER
to 0.  This fixes a condition where some UARTs send an infinite stream of
RXRDY interrupts.
Update pmax drivers to use "const" on 2nd arg to cfprint_t:
    turbocnhannel: include/tc_machdep.h, tc/tc_subr.c, tc/asic.c
    kn01 baseboard: pmax/mainbus.c
Commit 1.2 release branch changes (1.6.4.1) back onto main branch.
don't include bsd.subdir.mk, especially _before_ bsd.prog.mk:
(1) bsd.prog.mk already includes bsd.subdir.mk, and
(2) including bsd.subdir.mk first screws up the clean/cleandir targets
    in such a way that the program's objects don't get blown away
    when you make clean.
include stdlib.h to bring malloc()'s prototype into scope.
key on ELF_TOOLCHAIN being defined (presumably in /etc/mk.conf)
to signal that the build is happening on a machine with an ELF
toolchain.  This is temporary, until a better toolchain-recognition
scheme is worked out.
Actually set the RTLD_DL flag in dlopen'ed shared objects, per PR#2791.