Add example about os.path.walk , which may used to implete --recursive optionmaster
tree3abe66417b2314bc77e762dfff90a2413b4b30b2
-rw-r--r-- 395 TODO
drwxr-xr-x - example
-rw-r--r-- 19130 smtpser.py
-rw-r--r-- 1957 smtpssl.py
drwxr-xr-x - test
-rwxr-xr-x 8374 xmailer.py