MariaDB Server 10.2.14 changed the order that CASE items are processed.
This broke the engine's CASE handling. This patch uses the new order
instead since this is what will be used in 10.2 and 10.3 going forward.
In ha_calpont_execplan, Allow OR to be parsed; in searched_case parsing, reverse the order of processing arguments so that ptWorkStack.pop() is executed in the same order as the arguments being processed.
In func_case, modify to pass left and right to getBoolVal, if they exist.
For the initial BLOB/TEXT pull request we put them in the same bucket as
VARBINARY, forcing many functions to be disabled. This patch enables the
same TEXT function support as VARCHAR.
