fix more broken markdown links

We fix more markdown links in markdown files that refer to files
internally to the web site.

Added tmp tools to find and print various markdown links:

* `tmp/md-links.sh` - print all markdown links
* `tmp/md-token-links.sh` - print all markdown links that start with a **%%TOKEN%%**
* `tmp/md-local-links.sh` - print all markdown links to a local file
* `tmp/md-link-paths.sh` - print local file paths referenced in markdown links

Fixed a number of markdown formatting problems with `thanks-for-help.md`.
Fixed markdown links to files in `thanks-for-help.md`.  Improved
heading levels in `thanks-for-help.md`, and made entry sections consistent.

Changed all markdown links that end in "))" to end in a better way.

Explained in `markdown.md` why we are avoiding markdown links that
end in "))".

Ran `make www` to perform the above.

TODO: Fix stuff we broke by mistake doing the above.

TODO: Fix more broken markdown links.

2014/birken/README.md

@@ -153,13 +153,13 @@ protocol appears below, but feel free to explore before reading further.
 The inspiration for this program comes from [Star Trek VI: The Undiscovered
 Country](https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country),
 specifically the final confrontation between the
-[Enterprise](https://memory-alpha.fandom.com/wiki/USS_Enterprise_(NCC-1701)) and
+[Enterprise](https://memory-alpha.fandom.com/wiki/USS_Enterprise_(NCC-1701)) and
 the enhanced prototype [Klingon Bird of
 Prey](https://memory-alpha.fandom.com/wiki/Klingon_Bird-of-Prey). The definitive
 feature of the prototype was its ability to fire while cloaked. But, perhaps
 even more impressive was its ability to keep an open communication channel with
 the Enterprise throughout the battle, enabling the antagonist
-[Chang](https://memory-alpha.fandom.com/wiki/Chang_(General)) to taunt [Captain
+[Chang](https://memory-alpha.fandom.com/wiki/Chang_(General)) to taunt [Captain
 Kirk](https://memory-alpha.fandom.com/wiki/James_T._Kirk) with
 [Shakespearian](https://en.wikipedia.org/wiki/William_Shakespeare) quotes while
 he slowly pelted his ship with torpedoes.  Normally, cloaked vessels must
@@ -174,13 +174,13 @@ James T. Kirk and [Odo](https://memory-alpha.fandom.com/wiki/Odo) (the [Deep
 Space 9](https://memory-alpha.fandom.com/wiki/Star_Trek:_Deep_Space_Nine)
 character was played by René Auberjonois who also appeared as [Colonel
 West](https://memory-alpha.fandom.com/wiki/West) in [Star Trek
-VI](https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country));
+VI](https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country) movie);
 the `STARDATE` constant makes timing configurable; and, the constant `k` stands
 for [Khan](https://memory-alpha.fandom.com/wiki/Khan_Noonien_Singh) (in the
 final engagement in [Star Trek II: The Wrath of
 Khan](https://memory-alpha.fandom.com/wiki/Star_Trek_II:_The_Wrath_of_Khan), the
 damaged Enterprise managed to disable the USS
-[Reliant](https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864))'s shield
+[Reliant](https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864) ship)'s shield
 generator by accessing its prefix code: 16309).
 
 

2014/birken/index.html

@@ -500,13 +500,13 @@ James T. Kirk and <a href="https://memory-alpha.fandom.com/wiki/Odo">Odo</a> (th
 Space 9</a>
 character was played by René Auberjonois who also appeared as <a href="https://memory-alpha.fandom.com/wiki/West">Colonel
 West</a> in <a href="https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country">Star Trek
-VI</a>);
+VI</a> movie);
 the <code>STARDATE</code> constant makes timing configurable; and, the constant <code>k</code> stands
 for <a href="https://memory-alpha.fandom.com/wiki/Khan_Noonien_Singh">Khan</a> (in the
 final engagement in <a href="https://memory-alpha.fandom.com/wiki/Star_Trek_II:_The_Wrath_of_Khan">Star Trek II: The Wrath of
 Khan</a>, the
 damaged Enterprise managed to disable the USS
-<a href="https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864)">Reliant</a>’s shield
+<a href="https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864)%20ship">Reliant</a>’s shield
 generator by accessing its prefix code: 16309).</p>
 <h3 id="secondary-size-limit">Secondary size limit</h3>
 <p>As obligated by a program that employs 23rd century cloaking technology, when