ODBC -> MSSQL transactions (HACK)

I had some problems with transactions, here is a hack around that works
for me. It is based on the fact that apparently mssql requires the
"transaction" keyword in "commit transaction" when it is over odbc. 
ODBC actually has a different scheme for transactions based on turning
off autocommit, and then doing the commit manually with SQLEndTran or
somesuch, that looked more difficult and with this all the tests pass. :-)

clsql -> unixodbc -> freetds (0.63) -> mssql 2000

Nathan Bird