- 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

The last big commit: let usr.sbin/ use WARNS=6 by default.

Simplify: move dumpcis.c and dumpcisfile.c into main.

make this warns=5 clean

Move dumpcis to its own directory, start to decouple from the
pccardc/pccardd history.

Package the dumpcisfile functionality into a new dumpcis command.
Also, don't build pccardc now. I've left it in place for people that
wish to build it to test experimental support for oldcard
functionality that may have been lost in newcard.