D.4.1 Modifications de la version 3.19.5

• Some new functions, some more optimization on joins.
• Should now compile clean on Linux (2.0.x).
• Added functions DATABASE(), USER(), POW(), LOG10() (needed for ODBC).
• In a WHERE with an ORDER BY on fields from only one table, the table is now preferred as first table in a multi-join.
• HAVING and IS NULL or IS NOT NULL now works.
• A group on one column and a sort on a group function (SUM(), AVG()...) didn't work together. Fixed.
• mysqldump: Didn't send password to server.