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

- Make the FreeBSD's USB library compile under Linux.
- Fix a compile warning where the return value of a call
to a write() function was ignored.
- Remove redundant include files from userland USB header files.
- Add some now needed include files to various C-files.

Sync to P4
- fix a transfer cancelling bug/segfault [1]
- correct a return code in the transfer cancel function.
- add new API function, libusb20_tr_bulk_intr_sync().

Submitted by: HPS
Reported by: Robert Jenssen [1]

LibUSB v1.0:

- Significantly improve libusb10 support.
- Many minor issues fixed.
- P4 ID: 166189, 165853, 165991, 166052, 166069

Submitted by: hps
Approved by: re

Sync the libusb 1.0 exported api to the latest GSoC code.

- Fix possible uninitialised variables and null derefs
- Support big transfers
- Various bug fixes and style changes

Submitted by: Sylvestre Gallon
Sponsored by: Google Summer of Code 2009
Approved by: re (kib)

Add files missed in r194674.

Add libusb 1.0 support which is compatible with the latest revision on
Sourceforge. Libusb 1.0 is a portable usb api released December 2008 and
supersedes the original libusb released 10 years ago, it supports isochronous
endpoints and asynchronous I/O. Many applications have already started using
the interfaces.

This has been developed as part of Google Summer of Code this year by Sylvestre
Gallon and has been cribbed early due to it being desirable in FreeBSD 8.0

Submitted by: Sylvestre Gallon
Sponsored by: Google Summer of Code 2009
Reviewed by: Hans Petter Selasky