client/mysql.cc:
  Increased version number
client/mysqltest.c:
  Changed to use default path
include/mysql.h:
  Changed prototype of mysql_server_init
libmysql/libmysql.c:
  Changed prototype of mysql_server_init
libmysqld/lib_sql.cc:
  Changed prototype of mysql_server_init
mysql-test/r/union.result:
  Added test for UNION bug
mysql-test/t/union.test:
  Added test for UNION bug