Added note to manual that usernames in GRANT don't allow wildcards.

for any host in the @code{144.155.166} class C subnet.

The simple form @code{user} is a synonym for @code{user@@"%"}.

MySQL doesn't support wildcards in user names.  Anonymous users are

defined by inserting entries with @code{User=''} into the

@code{mysql.user} table or creating an user with an empty name with the

@code{GRANT} command.

@strong{Note:} If you allow anonymous users to connect to the MySQL

server (which is the default), you should also add all local users as

@code{user@@localhost} because otherwise the anonymous user entry for the

local host in the @code{mysql.user} table will be used when the user tries to

log into the MySQL server from the local machine!  Anonymous users

are defined by inserting entries with @code{User=''} into the

@code{mysql.user} table. You can verify if this applies to you by executing

this query:

server, you should also grant privileges to all local users as

@code{user@@localhost} because otherwise the anonymous user entry for

the local host in the @code{mysql.user} table will be used when the user

tries to log into the MySQL server from the local machine!

You can verify if this applies to you by executing this query:

@example

mysql> SELECT Host,User FROM mysql.user WHERE User='';