correct url for proxy downloads

sshshare/__main__.py

@@ -261,7 +261,7 @@ def main():
         configdata['singularity']='singularity'
         configdata['img'] = 'sftp_img.img'
         configdata['secretserver']='https://cw-vm-d034.sa.nectar.org.au/sshshare/share/'
-        configdata['proxyserver']='https://cw-vm-d034.sa.nectar.org.au/download/retrieve/'
+        configdata['proxyserver']='https://cw-vm-d034.sa.nectar.org.au/download/retrieve'
         with open(configpath,'w') as f:
             f.write(yaml.dump(config))
     config.update(configdata)