Added the "EXTRA" option to PRAGMA synchronous that does a sync of the
containing directory when a rollback journal is unlinked in DELETE mode,
for better durability. The SQLITE_EXTRA_DURABLE compile-time option enables
PRAGMA synchronous=EXTRA by default.
Fix an issue with incorrect sharing of VDBE temporary registers between
co-routines that could cause incorrect query results in obscure cases. Ticket
d06a25c84454a.
Escape control characters in JSON strings. Fix for ticket
ad2559db380abf8.
Reenable the xCurrentTime and xGetLastError methods in the built-in
unix VFSes as long as SQLITE_OMIT_DEPRECATED is not defined.
Backwards Compatibility:
Because of continuing security concerns, the two-argument version
of the seldom-used and little-known fts3_tokenizer() function is
disabled unless SQLite is compiled with the SQLITE_ENABLE_FTS3_TOKENIZER.