several bug fixes

include/my_global.h:
  Fix for a clash with include files from Linux kernel source
mysys/charset.c:
  Fix for a bug with LEFT(), RIGHT() ... and GROUP BY clause
sql/sql_acl.cc:
  Sending error when global privilege is attempted at db level
sql/sql_parse.cc:
  Fix for the non-functioning max_user_connections

include/my_global.h

@@ -263,8 +263,10 @@ C_MODE_END
 #endif
 #ifdef HAVE_ATOMIC_ADD
 #define __SMP__
-#define CONFIG_SMP
 #include <asm/atomic.h>
+#ifndef CONFIG_SMP
+#define CONFIG_SMP
+#endif
 #endif
 #include <errno.h>				/* Recommended by debian */
 /* We need the following to go around a problem with openssl on solaris */

mysys/charset.c

@@ -315,6 +315,7 @@ static CHARSET_INFO *add_charset(uint cs_number, const char *cs_name, myf flags)
   cs->to_lower=tmp_to_lower;
   cs->to_upper=tmp_to_upper;
   cs->sort_order=tmp_sort_order;
+  cs->strxfrm_multiply=cs->mbmaxlen=1;
   if (read_charset_file(cs_number, cs, flags))
     return NULL;
 

sql/sql_acl.cc

@@ -2285,11 +2285,20 @@ int mysql_grant (THD *thd, const char *db, List <LEX_USER> &list,
 			    (!db ? rights : 0), revoke_grant,
 			    create_new_users)))
       result= -1;
-    else
+    else if (db)
     {
-      if (db && replace_db_table(tables[1].table, db, *Str, rights & DB_ACLS,
-				 revoke_grant))
+      ulong db_rights= rights & DB_ACLS;
+      if (db_rights  == rights)
+      {
+	if (replace_db_table(tables[1].table, db, *Str, db_rights,
+			     revoke_grant))
+	  result= -1;
+      }
+      else
+      {
+	net_printf(&thd->net,ER_WRONG_USAGE,"DB GRANT","GLOBAL PRIVILEGEY");
 	result= -1;
+      }
     }
   }
   VOID(pthread_mutex_unlock(&acl_cache->lock));

sql/sql_parse.cc

@@ -257,10 +257,11 @@ static bool check_user(THD *thd,enum_server_command command, const char *user,
 		  db ? db : (char*) "");
   thd->db_access=0;
   /* Don't allow user to connect if he has done too many queries */
-  if ((ur.questions || ur.updates || ur.connections) &&
+  if ((ur.questions || ur.updates || ur.connections || max_user_connections) &&
       get_or_create_user_conn(thd,user,thd->host_or_ip,&ur))
     return -1;
-  if (thd->user_connect && thd->user_connect->user_resources.connections && 
+  if (thd->user_connect && ((thd->user_connect->user_resources.connections) ||
+			    max_user_connections) && 
       check_for_max_user_connections(thd->user_connect))
     return -1;
   if (db && db[0])
@@ -308,7 +309,7 @@ static int check_for_max_user_connections(USER_CONN *uc)
   DBUG_ENTER("check_for_max_user_connections");
   
   if (max_user_connections &&
-      (max_user_connections <=  (uint) uc->connections))
+      (max_user_connections <  (uint) uc->connections))
   {
     net_printf(&(current_thd->net),ER_TOO_MANY_USER_CONNECTIONS, uc->user);
     error=1;