Now simply give an error if no database. (The "global SP feature" will be
done using PATH instead.)


mysql-test/r/sp-error.result:
  Removed test cases for undone "feature".
mysql-test/t/sp-error.test:
  Removed test cases for undone "feature".
sql/sql_parse.cc:
  Check if created procedure/function has a database; give error if not.
sql/sql_yacc.yy:
  Undid the "global SP feature".