Add try scripts to 2020/ferguson2, other updates

The try.sh script is for the original entry. The try.alt.sh is of course
for the alt version that I only recently made.

Removed html files recode.html and chocolate-cake.html (the horror! But
there is the markdown file so all is good... or would be if it wasn't
for the fact it's enciphered as a fun way to experience the entry .. or
else otherwise a frustration if there wasn't
2020/ferguson1/chocolate-cake.md? :-) ).

Updated .gitignore.

Minor updates to chocolate cake file: but of course for most people they
might want 2020/ferguson1/chocolate-cake.md instead.

This should be all that needs to be done for 2020/ferguson2 - for now
anyway. The documentation has not been checked for typos/formatting but
that might happen another time.

2020/ferguson2/try.alt.sh

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2020/ferguson2
+#
+# I, Cody Boone Ferguson, want to dedicate this entry in part to the millions of
+# poor souls that were lost during the tragedy that is the Second World War.
+# There are so many people who are unknown, unloved, unclaimed and even
+# unidentified. And who knows what they might have gone on to do if their lives
+# weren't - like it is with all other wars - needlessly taken from them? When
+# one considers it was all because the most powerful man in the world at the
+# time felt he should rule all others it makes it somehow even more tragic:
+# there wasn't even a good reason for the war (is there ever?).
+# 
+# If one were to write the name of every person who died in the conflict in a
+# book, it would take so many pages that the book would be so heavy, so long, so
+# expensive to print and it wouldn't bring anyone back to life nor would it erase
+# the suffering. Nothing will. It's horrible.
+# 
+# There really are no words that can truly describe the tragedy but I wish to
+# with my Enigma simulator honour each and every soul who was lost, or suffered,
+# or suffered the loss of friends or loved ones, as well as the world itself, in
+# and from one of the greatest tragedies in the history of mankind.
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" alt >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+# IOCCC obfuscated!
+read -r -n 1 -p "Press any key to encrypt IOCCC with default settings: "
+echo 1>&2
+echo "$ echo IOCCC | ./prog.alt" 1>&2
+echo IOCCC | ./prog.alt
+echo 1>&2
+
+# IOCCC obfuscated and de-obfuscated!:
+read -r -n 1 -p "Press any key to encrypt and then decrypt IOCCC with default settings: "
+echo 1>&2
+echo "$ echo IOCCC | ./prog | ./prog.alt" 1>&2
+echo IOCCC | ./prog | ./prog.alt
+echo 1>&2
+
+# more input fun:
+read -r -n 1 -p "Press any key to show try.this.txt: "
+echo 1>&2
+echo "$ cat try.this.txt" 1>&2
+cat try.this.txt
+read -r -n 1 -p "Press any key to encrypt text of try.this.txt with its own settings: "
+echo 1>&2
+echo "$ ./prog.alt - < try.this.txt 2>/dev/null" 1>&2
+echo 1>&2
+./prog.alt - < try.this.txt 2>/dev/null
+echo 1>&2
+
+# more obfuscated fun:
+read -r -n 1 -p "Press any key to send 'testing test tests' to recode: "
+echo 1>&2
+echo "$ echo testing test tests | ./recode" 1>&2
+echo testing test tests | ./recode
+echo 1>&2
+
+read -r -n 1 -p "Press any key to send 'testing test tests' to recode -> prog.alt: "
+echo 1>&2
+echo "$ echo testing test tests | ./recode | ./prog.alt - 2>/dev/null" 1>&2
+echo testing test tests | ./recode | ./prog.alt - 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to send 'testing test tests' to recode -> prog -> recode: "
+echo 1>&2
+echo "$ echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode" 1>&2
+echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode
+echo 1>&2
+
+read -r -n 1 -p "Press any key to send 'testing test tests' to recode -> prog -> recode -> prog.alt: "
+echo 1>&2
+echo "$ echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode | ./prog.alt - 2>/dev/null" 1>&2
+echo testing test tests | ./recode | ./prog - 2>/dev/null | ./recode | ./prog.alt - 2>/dev/null
+echo 1>&2
+
+# even more obfuscated fun saving and reading from files:
+#
+# initial clean up:
+rm -f conf input output output2
+# encrypt "testing test tests" with randomised settings saved in conf, saving
+# original string to input and original output to output:
+read -r -n 1 -p "Press any key to save settings and output, then encrypt: "
+echo 1>&2
+echo "$ echo testing test tests | tee input | ./recode -r -oconf | ./prog - 2>/dev/null >output" 1>&2
+echo testing test tests | tee input | ./recode -r -oconf | ./prog - 2>/dev/null >output
+read -r -n 1 -p "Press any key to show input file: "
+echo 1>&2
+cat input
+echo 1>&2
+read -r -n 1 -p "Press any key to show output file: "
+echo 1>&2
+cat output
+echo 1>&2
+# configure Enigma machine from conf file and read from output file, thus decrypting:
+read -r -n 1 -p "Press any key to decrypt the output from the above command: "
+echo 1>&2
+echo "$ ./recode -Rconf -foutput | ./prog - 2>/dev/null > output2" 1>&2
+./recode -Rconf -foutput | ./prog - 2>/dev/null > output2
+read -r -n 1 -p "Press any key to show output2: "
+echo 1>&2
+cat output2
+read -r -n 1 -p "Press any key to show input again: "
+echo 1>&2
+cat input
+echo 1>&2
+# make sure input and output2 are the same:
+read -r -n 1 -p "Press any key to compare input and output2: "
+echo 1>&2
+diff -s input output2
+diff -s input output2
+# final clean up
+rm -f conf input output output2