* meta: rename info version to redisVersion

* add client information for each session

* cmd: add `sessions` subcommand to list all client sessions

* meta/sql: sync session table when creating sessions to add 'info' column

* cmd/sessions: add --detail option to show sustained inode and locks related to each session

* cmd: remove `sessions` subcommand, and add its functions to `status`

* cmd/status: remove --detail flag, instead only show detailed information if sid is specified

* cmd/status: add -f/--format to specify format of output

* cmd/status: use only json format for now

* cmd/status: rename print to printJson