Making sieveshell more scripting friendly

[Torsten Schlabach]

Hi all!

I found that scripting sieveshell (for example, writing a bash script 
which iterates over mailboxes and does something to the sieve settings) 
is a bit tricky for two reasons:

1. You cannot pass the user's password on the command line.
2. You cannot pass it a command which is executed and the shell 
terminated afterwards.

Would anyone object to adding these two features?

Regards,
Torsten