fix links in 1992/buzzard.2/buzzard.2.README.html

The `1992/buzzard.2/buzzard.2.README.md` has been improved
so that links to files that is referenced are
directed to the proper web pages (web site or GitHub).

Links in `1992/buzzard.2/buzzard.2.README.md` markdown
files have been changed to the generated HTML files.

Changed `bin/gen-other-html.sh` VERSION from to "1.0.4 2024-04-13"
to "1.1 2024-04-20".

By default, we substitute _%%REPO_URL%%_ and _%%SITE_URL%%_
in inc files.

Changed `bin/subst.default.sh` VERSION from to "1.2.3 2024-04-13"
to "1.3 2024-04-20".

All `-s TOKEN=value` substitutions are applied to all markdown files
that are processed by `bin/md2html.sh`.

Substitutions of and **%%TOKEN%%** are performed on included HTML
content, content generated by the ‘before tool’ (-b tool), content
generated by the ‘after tool’ (-a tool), as well as the markdown
content given to the pandoc wrapper tool (-p tool).

It is an error, unless -S is given, for any phase, except HTML phases
20-29, to not substitute all **%%TOKEN%%**'s. For HTML phases 20-29, any
**%%TOKEN%%** that is not substituted are passed thru without substitution.

Update `bin/index.html` to clarify

Changed `bin/md2html.sh` VERSION from to "1.4 2024-04-18"
to "1.5 2024-04-20".

Fix the _BEFORE: 1st line of markdown file_ and _AFTER: last line
of markdown file_ HTML comments so that the true markdown file
source (not some temporary file) is identified.  This prevents
`authors.html`, `location.html` and `years.html` from always changing
due to different temporary files being used on each run.

Run `make www` to perform the above.

bin/md2html.sh

@@ -141,7 +141,7 @@ shopt -s lastpipe	# run last command of a pipeline not executed in the backgroun
 
 # set variables referenced in the usage message
 #
-export VERSION="1.4 2024-04-18"
+export VERSION="1.5 2024-04-20"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -1684,7 +1684,7 @@ fi
 
 # input.md is -, we will need to capture standard input into a new temporary file
 #
-export ORIG_INPUT_MD="$INPUT_MD"
+export ORIG_INPUT_MD="$MATCH_MD"
 if [[ -z $NOOP ]]; then
     if [[ $INPUT_MD == - ]]; then
 	export TMP_INPUT_MD=".$NAME.$$.stdin.md"
@@ -1751,6 +1751,7 @@ if [[ -z $NOOP ]]; then
     #
     echo "<!-- BEFORE: 1st line of markdown file: $ORIG_INPUT_MD -->" > "$TMP_STRIPPED_MD"
 
+    # perform the %%TOKEN%% substitutions markdown file AND
     # strip commented language after markdown code block
     #
     # We do not want the sed extended regular expression to be expanded, so
@@ -1759,10 +1760,10 @@ if [[ -z $NOOP ]]; then
     # SC2016 (info): Expressions don't expand in single quotes, use double quotes for that.
     # https://www.shellcheck.net/wiki/SC2016
     # shellcheck disable=SC2016
-    sed -E -e 's/^```[[:space:]]<!---[^-][^-]*-->/```/' "$INPUT_MD" >> "$TMP_STRIPPED_MD"
+    sed -E -e 's/^```[[:space:]]<!---[^-][^-]*-->/```/' -f "$TMP_SED_SCRIPT" "$INPUT_MD" >> "$TMP_STRIPPED_MD"
     status="$?"
     if [[ $status -ne 0 ]]; then
-	echo "$0: ERROR: strip commented language after markdown code block from $INPUT_MD into file:" \
+	echo "$0: ERROR: token substation and strip code block command language from $INPUT_MD into file:" \
 	     "$TMP_INPUT_MD failed, error code: $status" 1>&2
 	exit 25
     fi