- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

- Implement run-time expansion of the KTR buffer via sysctl.
- Implement a function to ensure that all preempted threads have switched
back out at least once. Use this to make sure there are no stale
references to the old ktr_buf or the lock profiling buffers before
updating them.

Reviewed by: marius (sparc64 parts), attilio (earlier patch)
Sponsored by: EMC / Isilon Storage Division

Catch up with r238925. ktr_entries may not be a power of 2.

Add -H flag to print thread id.

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

Remove unnecessary opt* definations.

Skip format flags, when parsing ktr_desc.

Really fix the relative timestamp bug. It was only incorrect for the ALQ
case. It seems entries are in reverse order when read from the kernel
memory but in the right order when read from a file (i.e. ALQ). Handle
both cases.

MFC after: 1 day

Fix -r flag to actually work. "now" comes after "then", not vice versa.

MFC after: 1 day

Markup and wording fixes.

Approved by: re (blanket)

Append a newline character to the usage string.

MFC after: 3 days

Sync program's usage() with manpage's SYNOPSIS.

Document the '-i' option which allows the user to specify a ktr events
log file.

Don't use an uninitialised variable when reading from a ktr alq file.

mdoc(7) fixes.

Add a "-r" flag to ktrdump(1) to print relative timestamps when used
with "-t" rather than absolute timestamps. This allows the reader
to get a better sense of latency between events, such as time to
schedule an interrupt thread from time the interrupt occurred. Assert
a copyright on ktrdump.c since I seem to be modifying it more than I
thought.

Add a quiet mode to ktrdump(1): if the "-q" flag is used, don't print
the pretty text header on top of the output. Simplifies feeding the
results of tracing into a script for mechanical processing.

When the 'f' flag is passed to ktrdump(1), use 40 characters for the
"file and line" field consistently; previously, a 32-character field
length was used for the table header, which resulted in the header
not lining up with the table.

Remove an unused variable.

Use strlcpy() instead of strcpy() to not overflow static buffers.

- Add the -i option to read in a saved ktr file output by KTR_ALQ.

The .Nm utility

Added missing DPADD detected by ``make checkdpadd''.

mdoc(7) police: fixed typo, minor markup nits.

Add a man page.

Submitted by: davidc

1. Add missing include of stdint.h.
2. Fix reversed arguments to strcpy.

Noticed by: davidc (2)

ktrdump is a utility to dump the ktr trace buffer from userland. It can
also be run on a core dump.