New interface sqlite3_limit() allows size and length limits to be
+ set on a per-connection basis and at run-time.
+
Improved crash-robustness: write the database page size into the rollback
+ journal header.
+
Allow the VACUUM command to change the page size of a database file.
+
The xAccess() method of the VFS is allowed to return -1 to signal
+ a memory allocation error.
+
Performance improvement: The OP_IdxDelete opcode uses unpacked records,
+ obviating the need for one OP_MakeRecord opcode call for each index
+ record deleted.
+
Performance improvement: Constant subexpressions are factored out of
+ loops.
+
Performance improvement: Results of OP_Column are reused rather than
+ issuing multiple OP_Column opcodes.
+
Fix a bug in the RTRIM collating sequence.
+
Fix a bug in the SQLITE_SECURE_DELETE option that was causing
+ Firefox crashes. Make arrangements to always test SQLITE_SECURE_DELETE
+ prior to each release.