AbstractJDBCStorage: Adopt from uApprove, always log database exceptions as errors to the PrivacyLens log, add comments
JDBCStorage: Use PrivacyLens' AbstractJDBCStorage
manual: Add information on "graceful" setting to the storage system
manual: Convert paragraphs to single lines for a small benefit in consistent rendering, but a detriment in editing.
SourceAction: Do not include expansions of machine readable attributes when handling attribute groups