Remove stale declaration, fix a typo in comment.

MYSQL_FIELD *unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields,

			   my_bool default_value, uint server_capabilities);

void free_rows(MYSQL_DATA *cur);

my_bool mysql_autenticate(MYSQL *mysql, const char *passwd);

void free_old_query(MYSQL *mysql);

void end_server(MYSQL *mysql);

my_bool mysql_reconnect(MYSQL *mysql);

    update user set password=PASSWORD("hello") where user="test"

  This saves a hashed number as a string in the password field.

  The new autentication is performed in following manner:

  The new authentication is performed in following manner:

  SERVER:  public_seed=create_random_string()

           send(public_seed)