Changes 3.6.23:
* Added the secure_delete pragma
* Added the sqlite3_compileoption_used() and sqlite3_compileoption_get()
  interfaces as well as the compile_options pragma and the
  sqlite_compileoption_used() and sqlite_compileoption_get() SQL functions.
* Added the sqlite3_log() interface together with the SQLITE_CONFIG_LOG verb
  to sqlite3_config(). The ".log" command is added to the Command Line Interface
* Improvements to FTS3
* Improvements and bug-fixes in support for SQLITE_OMIT_FLOATING_POINT
* The integrity_check pragma is enhanced to detect out-of-order rowids
* The ".genfkey" operator has been removed from the Command Line Interface
* Updates to the co-hosted Lemon LALR(1) parser generator. (These updates did not affect SQLite.)
* Various minor bug fixes and performance enhancements

(adam)