include/mysql_com.h:
  new UDF arguments interface
sql/item.cc:
  added lenghth name foe item (to avoid strlen() call)
sql/item.h:
  added lenghth name foe item (to avoid strlen() call)
sql/item_func.cc:
  new UDF arguments
sql/sql_parse.cc:
  fixed problem with UDF in 5.0
sql/sql_yacc.yy:
  new syntax of UDF arguments
sql/udf_example.cc:
  new UDF example (stupid function to test parameters)
tests/udf_test.res:
  new UDF example (stupid function to test parameters)
tests/udf_test:
  new UDF example (stupid function to test parameters)