Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Switch to our preferred 2-clause BSD license.

Approved by: bp

avoid potential null ptr derefs

Noticed by: Coverity Prevent analysis tool

/* -> /*- for license, minor formatting changes

Use __FBSDID().

Major update of NCP requester:

Use mchain API to work with mbuf chains.

Do not depend on INET and IPX options.

Allocate ncp_rq structure dynamically to prevent possible stack overflows.

Let ncp_request() dispose control structure if request failed.

Move all NCP wrappers to ncp_ncp.c file and all NCP request processing
functions to ncp_rq.c file.

Improve reconnection logic.

Misc style fixes.

Enable '=' character in the filename.

Submitted by: Dan Nelson <dnelson@emsphone.com>

Change structure field named 'toupper' to 'to_upper' to avoid conflict
with the macro of the same name. Same thing for 'tolower'.

Remove unnessary includes.

Import kernel part of ncplib: netncp and nwfs

Reviewed by: msmith, peter
Obtained from: ncplib