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

sys/rman.h now requires sys/types.h. Include it to make the API match
the man page again.

Submitted by: Raphael Kubo da Costa
MFC after: 2 weeks

Expand length of pnpinfo and length fields since pccard pnpinfo can
easily be longer than 64 characters.

Expose the new kernel data structures to libdevinfo:
o Added dd_pnpinfo, dd_location, dd_devflags, dd_flags and dd_state
o Copy/initialize these as necessary.
o Document the changes to the interface in devinfo.3.

This is the Device Information Library, libdevinfo.

The devinfo library provides access to the kernel's internal device
hierarchy and to the I/O resource manager. The library uses a
sysctl(9) interface to obtain a snapshot of the kernel's state which
is then made available to the application.