Gromox 2.2

Behavioral changes:

• The /usr/libexec/gromox/rebuild utility has been removed in favor of using SQLite's own .clone / .recover commands.
• dbop_sqlite: perform integrity check ahead of sqlite database upgrades

Fixes:

• emsmdb: sending mail could have yielded success even if there was an outgoing SMTP server outage
• exmdb_provider: repair SQL logic errors showing up when a folder's contents are requested in Conversation mode
• exmdb_provider: only delete links, not messages, from search folders

Enhancements:

• tools: add --integrity option for mkprivate, mkpublic, mkmidb