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)

Mark wire data structures in netatalk as __packed so that they are
properly (un)padded on the arm platform. With this change, FreeBSD/arm
boxes are able to route AppleTalk properly.

Submitted/tested by: Nathan Whitehorn <nathanw at uchicago dot edu>
Tested on: arm, i386, amd64
Approved by: re (kensmith)

Clean up DDP layer netatalk code:

- General style(9) cleanup -- white space, braces, line wraps, etc.

- Annotate a lack of synchronization the global route cache if the input
routine is invoked with parallelism.

- Remove unused debugging code.

/* -> /*- for license, minor formatting changes, insert COPYRIGHT into files

Obtained from: netatalk distribution netatalk@itd.umich.edu

Kernel Appletalk protocol support
both CAP and netatalk can make use of this..
still needs some owrk but it seemd the right tiime to commit it
so other can experiment.