Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2594845 by er.manojsharma, tarekdj, snehi, dpopdan, anil280988, jhodgdon, cilefen: Many database driver classes have no class doc blocks

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #1839998 by wiifm, mcm.guaba, Josh Waihi: Fixed TruncateQuery implemented as 'DELETE FROM' in MySQL and SQLite, but not PostgreSQL, causing nefarious table locking.