import an old rename script

Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>

old/rename-upper-to-lower-recursively.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+# Usage:
+# cd /home/user/nico/Maildir/ethz/INBOX && find . -type d -exec ~/rename.sh {} \;
+
+old="$1"
+new="$(echo $old | tr '[A-Z]' '[a-z]')"
+
+if [ "$new" != "$old" ]; then
+   if [ ! -e "$old" ]; then
+      echo "Skipping already renamed $old"
+   else
+      mv -v "$old" "$new"
+   fi
+fi