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- In function 'handle_grant_struct' when searching the memory structures for an entry to modify, convert all entries here host.hostname is NULL to "" and compare that with the host passed in argument "user_from". - A user created with hostname "" is stored in "mysql.user" table as host="" but when loaded into memory it'll be stored as host.hostname NULL. Specifiying "" as hostname means that "any host" can connect. Thus is's correct to turn on allow_all_hosts when such a user is found. - Review and fix other places where host.hostname may be NULL. mysql-test/init_db.sql: Rename: BitKeeper/deleted/.del-init_db.sql~af2dfeabaa348dd7 -> mysql-test/init_db.sql mysql-test/r/grant.result: Add test cases for users with hostname "" mysql-test/t/grant.test: Add test cases for users with hostname "" - Test create, grant and drop as well as connecting as the user with hostname "". sql/sql_acl.cc: Convert places where host.hostname is NULL to "" before using it.
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