In echo_with_tabs(), set the number of printed tabs to 1 if it is
evaluated to less than 1 (typically if the third parameter is too small
comparatively to the text length).
This initial version can:
- create a mailbox (cyradm)
- create a mail alias (virtual_{alias|local}_map)
- create a valid recipient for postfix ({virtual|local}_recipient_map)
- create a password for the account (saslpasswd2)
- print settings to set in the MUA to use this account
- test arguments