(Part of fix for Bug#25621 Error in my_thread_global_end(): 1 threads didn't exit)
Give correct error message if InnoDB table is not found
(This allows us to drop a an innodb table that is not in the InnoDB registery)


BitKeeper/etc/ignore:
  added include/abi_check
libmysql/libmysql.c:
  Allow multiple calls to mysql_server_end()
  (Part of fix for Bug#25621 Error in my_thread_global_end(): 1 threads didn't exit)
mysql-test/r/innodb_mysql.result:
  Test case for drop of table that only has a .frm file
mysql-test/t/innodb_mysql.test:
  Test case for drop of table that only has a .frm file
sql/ha_innodb.cc:
  Give correct error message if InnoDB table is not found.
  (This allows us to drop a an innodb table that is not in the InnoDB registery)