Extension to open new terminal with same working directory

[Edward Z. Yang]

Excerpts from David House's message of Wed Sep 15 04:45:31 -0400 2010:
> I'd like M-S-RET to open a new terminal with the same working
> directory as the old buffer. Has anyone written an extension to do
> this, or is this possible in vanilla urxvt?

I use the following shell script to do this:

#!/bin/bash
NUM=$1
if [[ -z $1 ]]; then NUM="1"; fi
for i in $(seq 1 $1)
do
    nohup rxvt-unicode 2>/dev/null > /dev/null &
done