Provide a statistic to track the number of drops in each of the port's
txq's buf_ring.  The aggregate for all the queues of a port is already
provided in ifnet->if_snd.ifq_drops.

MFC after:	3 days.
Remove unused file.
route_output() always supplies info with RTAX_GATEWAY member that
points to a sockaddr of AF_LINK family. Assert this instead of
checking.
Fix installworld when nmtree is not on the host by only adding it to
ITOOLS when we will be using the host copy.

Fix installkernel when -DNO_ROOT is set.
Log the addition of login.conf.db, passwd, pwd.db, and spwd.db via cat -l.

Make cat a bootstrap tool to facilitate this.
Fix the -f option to follow the directions in POSIX. Specifically, when
the destination file exists, first try opening it with flags O_WRONLY
and O_TRUNC, and only unlink it if the open fails.
Allow the use of the 'depends_on provider' directive when dtrace(1)
isn't running as root. This is done by looking up providers in the
debug.dtrace.providers sysctl before trying an ioctl.
Don't call dt_provider_lookup() twice if we failed to read the sysctl.
Import part of r1712 from elftoolchain.

This revision makes it possible to update an ELF object opened in RDWR
mode, required by libdtrace.
Use official libelf APIs to add new symbols, rather than injecting a
buffer. The latter approach introduces some dependencies on libelf
internals, and in particular causes a double free on FreeBSD.
Tighten the bounds used in IS_OUT_OF_BOUNDS; j must be a valid index
into the input buffer, but the current code allows j to be -1 in the
reverse QS case.
Copy a kernel config from GENERIC.
Add KDB_UNATTENDED to my kernel config.
Don't compile umass(4) into the kernel.
Remove a bunch of devices I don't need, and set MODULES_OVERRIDE.
Fix a mutex recursion which occurs when a DTrace victim process forks.
Make sure to initialize $OBJS consistently regardless of whether $SRCS
is defined or not.
When newsyslog is used with the -t option, interval-based rotations
don't work properly. This because newsyslog always looks at the mtime of
${LOGNAME}.0 to see whether or not to do a rotation. Fix things so that
newsyslog looks for the most recently archived log when using the -t
option.
Remove an incorrect cast from my last commit.
Check j <= 0 instead of j - 1 < 0.