Add files missed in previous merge from HEAD

r216259 was a merge from HEAD at r216258, but missed a number of files.
Copy them from HEAD @216258.

Sponsored by:	The FreeBSD Foundation
Fix typo from r220148

Sponsored by:	The FreeBSD Foundation
Avoid alignment faults on ARM in netdump's ARP function

Based on a patch submitted by Boris Astardzhiev.

Sponsored by:	The FreeBSD Foundation
Remove extra copy of fstest (pjdfstest)

The rename done in r211352 was not properly brought to this project
branch, which had a copy in both fstest/ and pjdfstest/.

Sponsored by:	The FreeBSD Foundation