MYSQL_TEST_SKIP_CONNECT_FAILURE which controls how to deal with connection
problems. If MYSQL_TEST_SKIP_CONNECT_FAILURE = false (default) connection
problems will make a test fail. If you set MYSQL_TEST_SKIP_CONNECT_FAILURE
to any value that evaluates to true in PHP, a test which cannot connect to
the database will be skipped.
With this commit the MySQL internal mysqlnd set of ext/mysql tests is in
sync with HEAD. It's likely that php.net/HEAD fails on quite some tests.
Using ext/mysql from the MySQL internal mysqlnd SVN there should be zero
failures. Merging the MySQL internal mysqlnd SVN into HEAD will happen
soon so that we get a bug free version on php.net in the near future.
