Ability to enable/disable DBMS_OUTPUT from cli

[jgebal]

Previous versions of cli had DBMS_OUTPUT.ENABLED;
With release 3.1.6 this is no longer the case.
Some of our tests are relying on DBMS_OUTPUT and were working properly on previous version of cli. They started failing after upgrade.

[jgebal]

Ideally that schold be parameter to cli.
This way user can have control over that behavior.
I woyld leave default enabled probably.

[jgebal]

Or follow sqlcl and sqlplus (default=disabled)

[pesse]

Love the idea of a parameter