New feature from Davide Cavestro - allow using custom Java object serialization engines on a per-DB basis.

Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW.

Throw an explicit error to make it clear we don't support the TRIGGER combination of SELECT and FOR EACH ROW

Auto-server: 'Connection is broken' instead of 'Error opening database: Lock file modified in the future'.

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