MFC r344855 (by jhb):

Drop "All rights reserved" from my copyright statements.

Reviewed by: rgrimes
Differential Revision: https://reviews.freebsd.org/D19485

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Retire the INTR_FAST flag as it was obsoleted by the introduction of the
filter argument to bus_setup_intr().

- Talk about memory allocation in interrupt context
- Add uam to see also

Submitted by: Devon H. O'Dell <devon.odell@coyotepoint.com>

Fix the NAME section making whatis(1) happy in particular.

Mechanically kill hard sentence breaks and double whitespaces.

mdoc(7): Use the new feature of the .In macro.

Language clarification: s/an or/a/

ispell sweep of share/man/man9/*.

Fixed missing include in synopsis.

mdoc(7) police: Use the new .In macro for #include statements.

can not -> cannot

Removed whitespace at end-of-line; no content changes. I simply did
cd src/share; find man[1-9] -type f|xargs perl -pi -e 's/[ \t]+$//'

BTW, what editors are the culprits? I'm using vim and it shows
me whitespace at EOL in troff files with a thick blue block...

Reviewed by: Silence from cvs diff -b
MFC after: 7 days

mdoc(7) police: mark C types with Vt macro.

Document the ithread_* API used to manage interrupt threads and their
list of handlers.