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

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

MFC r233648:
Remove trailing whitespace per mdoc lint warning

Approved by: cperciva (implicit)

MFC r235211:

General mdoc(7) and typo fixes.

PR: 167696

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

Approved by: re (implicit)

mdoc: use mdoc spelling of Umlauts

mdoc: move remaining sections into consistent order

This pertains mostly to FILES, HISTORY, EXIT STATUS and AUTHORS sections.

Found by: mdocml lint run
Reviewed by: ru

Fix several typos in macros or macro misusage.

Found by: make manlint
Reviewed by: ru
Approved by: philip (mentor)

- Add support for UPDATING remote fetching.
- Reorganize EXAMPLES section in pkg_updating(1).
- Style fixes.
- Bump PKG_INSTALL_VERSION to 20100122.

Submitted by: beat
MFC after: 1 week

- Add long options to pkg_install.
- Remove check for '-?' as it's not listed in authorized options.
- Bump PKG_INSTALL_VERSION to 20080530.

Backout previous commit, since it's done without maintainers
approval. These changes were approved by adding it as port to
ports/ tree, but not for src/. I talked to PR submitter and miwi@
some days ago and explained the reasons for it, the both were agree
to add it to ports/ only.

Add the 'pkg_search' script.
This makes it easier to figure what packages you want to install.

Submitted by: Matthias Schmidt <schmidtm @ mathematik . uni-marburg . de>

Introduce pkg_updating(1) which scans for installed ports and shows
all ports/UPDATING entries that affect one of the installed ports,
and are relevant on the given machine.

PR: bin/117564
Submitted by: Beat Gaetzi <beat@chruetertee.ch>
MFC after: 14 days