- a new need_connect option is used when during BaseCommand init
- if need_connect is True, profile connection is necessary, so use_profile must be True too
- if need_connect if False, session can be started without connection, use_profile must be True
- if need_connect is None, use_profile can be True (need_connect will be set to True) or False (need_connect is not used)
- if need_connect is False (and so use_profile is True), a new --start-session option is usable
- param get and set are the first commands to use this option, so parameters can be changed if connection is not working
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