Small grammar fix.
Rewrite paragraph to fix better with section.

This paragraph was from text brought through from another document, and
as such, while this section was built "around it", the text itself was
stylistically different and otherwise problematic.  This change brings
it into form with the rest of the document.
Rewrite paragraph for readability.
Reword paragraph; Include ref: "standard requests"

Mostly these changes are wordsmith, but I added a note that violators
should ask for the "standard requests" for compliance to be adequate.
Typo fix.
Link to sponsors.
List published works & link to Git logs.

References and details regarding these published works from which some
text was incorporated already appeared in the commit logs in great
detail.  The information, already fully available in the Guide's Git
logs in full compliance with CC-BY-SA-4.0 §3(a)(1-2), now appears in
summary form additionally in the compiled PDF/HTML/Postscript output.
Remove incomplete lists of authors entirely.

The lists of authors in each part has been continually out of date and
incomplete.  There are multiple examples, here are a few:

  * In September 2005, John Sullivan made improvements and was not placed on
    the Authors lists until I did so in a March 2014 commit.

  * In March 2014, Martin Michlmayr submitted many patches, but was not
    placed on the Authors lists until I did so in an April 2014 commit.

There is no easy way to keep these Authors lists current, and they aren't
necessary under CC-BY-SA-4.0 anyway, so I herein remove the Authors lists.
Additionally, previous commit added "published sources" in each part, which
is more static and easier to keep up to date and provides similar
information.
Provide additional href link command.

Add additional command that can be used in place of href where
appropriate.
Add hyperlinks to remixed published works.

Now that a list of published works is part of the document proper, it is
reasonably practicable to add hyperlinks to those works.
List missing co-author on this published work.

Karen Sandler was co-author of the work herein referenced, and was
accidentally left off the list of authors in an earlier commit.
Additional published work.

This publish work was also referenced in the old commit logs already,
but now that we have a list in the work itself, it can also be listed
here.
Make descriptions uniform.

Descriptions in this list should be uniformly worded.
Remove spurious line.

This line was carried over as a paste from a previous version of the
paragraph above it, and is now no longer needed.