kbx: Fix schema of the fingerprint table.
* kbx/backend-sqlite.c (DATABASE_VERSION): Set to 2. (DATABASE_VERSION_MAX): New. (table_definitions): Rename field special to name and adjust users. <table fingerprint>: Drop the PRIMARY KEY from the fpr column. (migrate_from_v1_to_v2): New. (create_or_open_database): Detect a bad database version and try to migrate it.
- GnuPG-bug-id: T7892