Changes in release 3.19.4
-------------------------
* Fixed horrible locking bug when inserting in one thread and reading
in another thread.
* Fixed one-off decimal bug. 1.00 was output as 1.0.
* Added attribute `'Locked'' to process list as info if a query is
locked by another query.
* Fixed full magic timestamp. Timestamp length may now be 14, 12,
10, 8, 6, 4 or 2 bytes.
* Sort on some numeric functions could sort incorrectly on last
number.
* `IF(arg,syntax_error,syntax_error)' crashed.
* Added functions `CEILING()', `ROUND()', `EXP()', `LOG()' and
`SQRT()'.
* Enhanced `BETWEEN' to handle strings.