* Fix a define that prevented memsys5 from compiling
* Fix a problem in the virtual table commit mechanism that was causing
a crash in FTS3.
* Add the application-defined page cache
* Added built-in support for VxWorks
Changes 3.6.5:
* Add the MEMORY option to the journal_mode pragma.
* Added the sqlite3_db_mutex() interface.
* Added the SQLITE_OMIT_TRUNCATE_OPTIMIZATION compile-time option.
* Fixed the truncate optimization so that sqlite3_changes() and
sqlite3_total_changes() interfaces and the count_changes pragma return
the correct values.
* Added the sqlite3_extended_errcode() interface.
* The COMMIT command now succeeds even if there are pending queries. It returns * SQLITE_BUSY if there are pending incremental BLOB I/O requests.
* The error code is changed to SQLITE_BUSY (instead of SQLITE_ERROR) when
an attempt is made to ROLLBACK while one or more queries are still pending.
* Drop all support for the experimental memory allocators memsys4 and memsys6.
* Added the SQLITE_ZERO_MALLOC compile-time option.
67e61f2d40