Make the Terminus fonts an external package

Credit to Michael Allison for the patch and for the previous one
to build the fonts in the cross-compile.

sys/msdos/fetch-cross-compiler.sh

@@ -85,13 +85,13 @@ if [ ! -d djgpp/cwsdpmi ]; then
     rm csdpmi7b.zip
 fi
 
-#  PDCurses
+#  PDCurses (non-Unicode build uses this)
 if [ ! -d "pdcurses" ]; then
 	echo "Getting ../pdcurses from https://github.com/wmcbrine/PDCurses.git" ; \
 	git clone --depth 1 https://github.com/wmcbrine/PDCurses.git pdcurses
 fi
 
-#  PDCursesMod
+#  PDCursesMod (Unicode build uses this)
 if [ ! -d "pdcursesmod" ]; then
 	echo "Getting ../pdcursesmod from https://github.com/Bill-Gray/PDCursesMod.git" ; \
 	git clone --depth 1 https://github.com/Bill-Gray/PDCursesMod.git pdcursesmod
@@ -115,6 +115,24 @@ if [ ! -d djgpp/djgpp-patch ]; then
     cd ../../
 fi
 
+FONT_VERSION="4.49"
+FONT_FILE="terminus-font-$FONT_VERSION"
+FONT_RFILE="$FONT_FILE.1.tar.gz"
+FONT_URL="https://sourceforge.net/projects/terminus-font/files/$FONT_FILE/$FONT_RFILE"
+
+#  fonts
+if [ ! -d "$FONT_FILE" ]; then
+    echo "Getting terminus fonts"
+    if [ "$(uname)" = "Darwin" ]; then
+	#Mac
+	curl -L $FONT_URL --output $FONT_RFILE
+    else
+	wget --quiet --no-hsts $FONT_URL
+    fi
+    tar -xvf $FONT_RFILE
+    rm $FONT_RFILE
+fi
+
 cd ../
 
 # Don't fail the build if lua fetch failed because we cannot do anything about it