Remove 1986/hague alt code, make main entry

I fixed it so that the form where it would segfault (after printing the
correct output) no longer occurs.

The thanks file has had a note added towards the top about changing to
fgets(), noting that although more is mentioned in the FAQ, it can be a
real problem with some systems. The best example of it being beneficial
is 1990/tbr. Naturally I also updated the thanks file for 1986/hague
too, updating the details.

1986/hague/README.md

@@ -9,10 +9,6 @@ UK
 make all
 ```
 
-There is an alternate version which uses `fgets()`. See the Alternate code
-section below as well as the [bugs.md](/bugs.md) file for more details as to why
-it is worth having as an alternate version.
-
 ## To use:
 
 ```sh
@@ -35,24 +31,6 @@ Also try:
 echo IOCCC | ./hague 2>/dev/null
 ```
 
-## Alternate code:
-
-Whereas with some entries the change to `fgets()` (see the [FAQ](/faq.md) for
-details on why this has been done) can be done in the original code this entry
-is more complicated in that although both forms of input show the correct
-output, one form segfaults after the output.
-
-If you wish to use this alternate code, do:
-
-```sh
-make alt
-```
-
-Use `hague.alt` as you would `hague` above. As for which form will segfault
-after outputting the text it is when text is piped into the program. Again see
-the [bugs.md](/bugs.md) file for more details.
-
-
 
 ## Judges' remarks: