CLI: Global settings handler: Settings of array type processing fixed

[olegiv]

#./elefant conf Database.master[pass] qwerty 

generates an error: Invalid setting name: master[pass]

Square brackets have to be enabled in a setting name.

[jbroadway]

Thanks! I merged but changed it in a couple ways:

• Added more input validation
• Changed the syntax to Section.setting.key for consistency

Using ./elefant conf Database.master[driver] sqlite actually added a new entry instead of replacing the old one. Now it updates the original and the syntax is ./elefant conf Database.master.driver sqlite.

[olegiv]

Thank you!