Console improving and administration tools

[zloidemon]

• Rename tarantoolctl to tctl. It would more fast access to the system and not miss to run another tarantool when you have to fix system/taranool(instance).
• Rename enter to login to access console, and ask login and password of the user. Or added root permissions for enter, but login will have access all where users will able to use their login/password to access by config from ~/.tarantool or on the fly.
• Auto compilation for tctl to bash/zsh. Like servi ast res which will auto complete to service asterisk restart.
• Show logs in the console. When you logged in tarantool, would be nice to show logs on the fly it its need.
• Related to above, add support sticky console prompt. If you have a lot logs/data in the console, very good thing to stick tarantool> to the last line of terminal, where you can write something but on the time you will see what does an application and write. (You can see asterisk -rvv, how it works.)
• Add execute in instance without log in tarantool and support args like -e, -l, and etc. For example:
  • login to tarantool -> tctl -l instance_name
  • execute something -> tctl -l instance_name -e 'function x(e) return space:select{e} end; x(1);'
• Readline tab completion, for example: https://github.com/torch/trepl

[Sulverus]

Nice, i think -le flags will be useful.

[rtsisyk]

• tctl makes no sense, IMHO.
• tarantoolctl enter uses console via unix socket. We don't have authorization on console port.
• Auto completion for command line is nice feature
• -le may be useful
• Autocompletion for admin console is must have