Update contributed man page file names and compilation script for the eventual possibility of non-man1 man pages (hopefully a Dockerfile.5.md, for example)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)

contrib/man/md/md2man-all.sh

@@ -9,8 +9,14 @@ cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 	pwd
 }
 
-mkdir -p ../man1
-
-for FILE in docker*.md; do
-	pandoc -s -t man "$FILE" -o "../man1/${FILE%.*}.1"
+for FILE in *.md; do
+	base="$(basename "$FILE")"
+	name="${base%.md}"
+	num="${name##*.}"
+	if [ -z "$num" -o "$base" = "$num" ]; then
+		# skip files that aren't of the format xxxx.N.md (like README.md)
+		continue
+	fi
+	mkdir -p "../man${num}"
+	pandoc -s -t man "$FILE" -o "../man${num}/${name}"
 done