MFC r298904:

Spelling fixes supplied by pfg@, detected with codespell, plus
additional misspellings detected by igor.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Updates for netgraph node manual pages.

Discussed with: glebius
Submitted by: Mamontov Roman <mr.xanto@gmail.com>

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

Globally replace u_int*_t from (non-contributed) man pages.

The reasoning behind this, is that if we are consistent in our
documentation about the uint*_t stuff, people will be less tempted to
write new code that uses the non-standard types.

I am not going to bump the man page dates, as these changes can be
considered style nits. The meaning of the man pages is unaffected.

MFC after: 1 month

Fix typos and spelling mistakes.

Add usage example:
Limit outgoing data rate over fxp0 Ethernet interface to 20Mbit/s
and incoming packet rate to 5000pps.

Describe new NG_CAR_COUNT_PACKETS option.

Fix one more typo.

Fix some mistakes.
Update my email.

Fix typos.

Text reformatting.

Approved by: glebius (mentor)

A node that implements various traffic shaping and rate limiting algorithms.

Approved by: glebius (mentor)