graphics/psftools: Add comments about former doinst.sh.

Signed-off-by: B. Watson <yalhcru@gmail.com>

graphics/psftools/psftools.SlackBuild

@@ -120,5 +120,17 @@ cat $CWD/slack-desc > $PKG/install/slack-desc
 # X fonts would need this:
 ## cat $CWD/doinst.sh > $PKG/install/doinst.sh
 
+# Contents of doinst.sh would be:
+## # Update the X font indexes:
+## if [ -x /usr/bin/mkfontdir  -a -x /usr/bin/mkfontscale ]; then
+##   ( cd usr/share/fonts/misc
+##     /usr/bin/mkfontscale .
+##     /usr/bin/mkfontdir .
+##   )
+## fi
+## if [ -x /usr/bin/fc-cache ]; then
+##   /usr/bin/fc-cache -f
+## fi
+
 cd $PKG
 /sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}