it breaks binary compatibility. The patch will be left intact
in 5.1. Warning: this changeset should be null-merged into 5.1.
A separate commit in order to push into the release clone of 
5.0.19.


libmysql/libmysql.c:
  Undo the patch for Bug#16144
tests/mysql_client_test.c:
  Undo the patch for Bug#16144