GRANT ... IDENTIFIED BY [ PASSWORD ] ...
GRANT ... IDENTIFIED VIA ... [ USING ... ]
GRANT ... REQUIRE ...
GRANT ... MAX_xxx ...
SET PASSWORD FOR ... = ...
* rename all debugging related command-line options
and variables to start from "debug-", and made them all
OFF by default.
* replace "MySQL" with "MariaDB" in error messages
* "Cast ... converted ... integer to it's ... complement"
is now a note, not a warning
* @@query_cache_strip_comments now has a session scope,
not global.
configuration wizard to fail
Made the fields mysql.user.plugin and mysql.user.authentication_string
nullable to conform with some older clients doing inserts instead of
using the commands.