Various fixes and updates

Make lines beginning (in markdown files) 'BTW' bold. Rebuilt the
respective html pages.

Slight update to abstract in two entries (1985/shapiro and
1994/shapiro). One is changing 'defines' to '#defines' and the other was
a typo fix.

Fixed make gen_next: added missing new files.

Various fixes in next/register.html (typos and other things).

1984/mullender/README.md

@@ -40,7 +40,7 @@ start over once it times out or if one hits a key.
 Note that the microseconds is argc and it uses `atoi()` which does NOT check for
 overflow!
 
-BTW: is there such a thing as too fast a CPU ? :-) Actually yes for certain code
+**BTW**: is there such a thing as too fast a CPU ? :-) Actually yes for certain code
 which is probably not as uncommon as you think :-).
 
 
@@ -114,7 +114,7 @@ couldn't!  :-)
 
 What happens if you hit enter after it writes a line of output?
 
-BTW: to this day, 2023, this remains one of my (Landon Curt Noll's) all time
+**BTW**: to this day, 2023, this remains one of my (Landon Curt Noll's) all time
 favorite entries!
 
 

1984/mullender/index.html

@@ -474,7 +474,7 @@ is it required one to hit enter for it to print another line; the alternate code
 start over once it times out or if one hits a key.</p>
 <p>Note that the microseconds is argc and it uses <code>atoi()</code> which does NOT check for
 overflow!</p>
-<p>BTW: is there such a thing as too fast a CPU ? :-) Actually yes for certain code
+<p><strong>BTW</strong>: is there such a thing as too fast a CPU ? :-) Actually yes for certain code
 which is probably not as uncommon as you think :-).</p>
 <h2 id="try">Try:</h2>
 <pre><code>    ./mullender.alt
@@ -519,7 +519,7 @@ second word.</p>
 produce a message on the screen. Can you guess what is printed? We knew you
 couldn’t! :-)</p>
 <p>What happens if you hit enter after it writes a line of output?</p>
-<p>BTW: to this day, 2023, this remains one of my (Landon Curt Noll’s) all time
+<p><strong>BTW</strong>: to this day, 2023, this remains one of my (Landon Curt Noll’s) all time
 favorite entries!</p>
 <h3 id="gentab.c">gentab.c</h3>
 <p>In 2023 remarks were discovered from <a href="../../authors.html#Sjoerd_Mullender">Sjoerd