SVN repro into HEAD. Again, it might happen that I crash the set of tests
and don't mention one or the other change while merging. Blame me...
1) Note the new environment variables to control the test run
2) Variables $IS_MYSQLND and $MYSQLND_VERSION are for writing portable tests
3) sys_get_temp_dir function is for PHP5/PHP6 portability
mysqli_driver
mysqli_warning
mysqli_exception
mysqli_sql_exception
Improved embedded server support
changed testsuite to work also with embedded server
Made statement and resultset classes extendable
minor fixes