Remove stale declaration, fix a typo in comment.

include/sql_common.h

@@ -25,7 +25,6 @@ extern "C" {
 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);

sql/password.c

@@ -35,7 +35,7 @@
     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)