move fix thanks a file, update top level html links, rename CONTRIBUTING.md

The fix thank you's have been moved from `README.md` to
`thanks-for-fixes.md`.

**WARNING**: Some mistakes may have been made in doing this.
We presume later changes by others will correct any issues.

The `CONTRIBUTING.md` was renamed `how-to-enter.md`.

A 3rd line of links was added to top level html such as
`contact.html`, `index.html`, `judges.html`, `winners.html`,
and `years.html`.

Improved blank line use in a number (but not all) `README.md` files.

1994/schnitzi/README.md

@@ -14,12 +14,14 @@ US
 make all
 ```
 
+
 ## To run:
 
 ```sh
 ./schnitzi < textfile
 ```
 
+
 ## Try:
 
 ```sh
@@ -27,16 +29,6 @@ make all
 ./schnitzi < /etc/passwd
 ```
 
-NOTE: the buffer size is very small at 100. It's easy to fix the buffer size but
-it is not as easy to change it to `fgets()`. [Cody Boone
-Ferguson](/winners.html#Cody_Boone_Ferguson) gives some hints in the
-[bugs.md](/bugs.md) file on how this entry works which might be useful in order
-to get this to use `fgets()` which would prevent a warning at linking or
-runtime, the latter of which is interspersed with the output of the program. The
-file [schnitzi.alt.c](schnitzi.alt.c) has this to get anyone started, should
-they wish to tackle it (Cody might in time). The problem with changing the buffer
-size is that even when it works the generated output (see judges' remarks below)
-will not be 100% correct duplication of the program.
 
 ### Alternate code:
 
@@ -60,6 +52,7 @@ Compare the output of the program with its source.  Sure the output
 is different, but there is more than meets the `diff`'s eye.  Can you
 find out why?
 
+
 ## Author's remarks:
 
 ### SPOILER:
@@ -111,6 +104,7 @@ needed to pad it put it over the limit -- it nearly filled a 79 by
 this other version to anyone interested -- contact me by email
 at schnitzi@east.isx.com.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.