at least partially. It doesn't crash or give packets out of order
any more, but it's unclear why it doesn't actually return anything
from within an SP. This should be investigated at some point, but
for the moment this will have to do. (It is a rather obscure feature... :)


mysql-test/r/sp.result:
  Test case for BUG#4318.
mysql-test/t/sp.test:
  Test case for BUG#4318.
sql/sql_yacc.yy:
  Recognize HANDLER READ as another statement that might result in multiple results.