MFC r291832,r291833,r291834,r291835,r291836,r291838:

r291832:

Fix -Wformat warnings by using the correct format qualifiers

Sponsored by: EMC / Isilon Storage Division

r291833:

- Use ANSI C function prototypes/definitions instead of K&R style ones
- Add a missing return type for main(..)

Sponsored by: EMC / Isilon Storage Division

r291834:

Add missing headers and sort #includes per style(9)

Sponsored by: EMC / Isilon Storage Division

r291835:

Use ANSI C function prototypes/definitions instead of K&R style ones

Sponsored by: EMC / Isilon Storage Division

r291836:

Use `==` instead of `=` in the function comment above split(..) so mkh -p
exposes split(..).

Sponsored by: EMC / Isilon Storage Division

r291838:

Fix -Wformat issues and minor whitespace issues in surrounding areas

Sponsored by: EMC / Isilon Storage Division

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

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

Update for recent changes to struct re_guts. Disable printing the contents
of OANYOF sets for the moment.

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

Remove 'register' keyword.

Spencer's regex(3) test code.

Obtained from: BSD/OS