When a listowner issues a GET listname command, the file
is sent to the owner with the following as the first record,
PUT listname PW=XXXXXX
and the keyword PW= is removed.
What is the possibility of leaving the keyword PW= in the
list header, but changing the password to XXXXXXXX?
This would make it easier for the naive list owner to remember to change
the XXXXXX in the PW= keyword back to the desired password.