skytools.sql_tokenizer: support fully-qualified names
skytools.sql_tokenizer: support fully-qualified names

It's easier to merge name parts here than to do it in upper layers.

The merging does not support some crazier parts of sql syntax
like comments between name parts, so it defaults to off.

markokr/skytools,markokr/skytools,overdrive3000/skytools,tarvip/skytools,tarvip/skytools,markokr/skytools,overdrive3000/skytools,overdrive3000/skytools,tarvip/skytools