Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Spelling fixes for tools/

Add some $FreeBSD$ tags so svn will allow the commit.

I forgot to commit this fix that is now kgdb aware...

add a set of scripts that I posted to -current last year. This makes
debugging kernels and kernel modules much easier. It will automaticly
locate kernel source, extract kernel module information, and rerun gdb
to load kernel module symbol information (if available by compiling module
w/ debuging symbols).

I have not run these recently, so may need to be updated to work with
gdb6. Feel free to fix as appropriate for -current.