These fixes are pretty pedantic, but they do simplify the script a
little.
* Checking the existence of a file/directory before creating/deleting
it adds complexity and raciness. There are better options.
* mkdir -p does the job of making sure a directory exists. (It only
fails if there's a filesystem error or something.)
* Likewise, rm -f doesn't fail if the file doesn't exist.
* rm -r isn't neccessary because the socket shouldn't be a directory.
(If it is for some reason, that should be an error.)
The address has changed from "59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA" to "51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA" some time ago.