Merge mockturtle.local:/home/dlenev/src/mysql-5.0-bg25966-2

into  mockturtle.local:/home/dlenev/src/mysql-5.1-bg25966

sql/mysqld.cc

@@ -1804,6 +1804,12 @@ static bool cache_thread()
       thd= thread_cache.get();
       thd->thread_stack= (char*) &thd;          // For store_globals
       (void) thd->store_globals();
+      /*
+        THD::mysys_var::abort is associated with physical thread rather
+        than with THD object. So we need to reset this flag before using
+        this thread for handling of new THD object/connection.
+      */
+      thd->mysys_var->abort= 0;
       thd->thr_create_time= time(NULL);
       threads.append(thd);
       return(1);

sql/sp_head.cc

@@ -1127,6 +1127,7 @@ sp_head::execute(THD *thd)
         thd->clear_error();
         thd->is_fatal_error= 0;
 	thd->killed= THD::NOT_KILLED;
+        thd->mysys_var->abort= 0;
 	continue;
       }
     }

sql/sql_parse.cc

@@ -689,7 +689,10 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   DBUG_ENTER("dispatch_command");
 
   if (thd->killed == THD::KILL_QUERY || thd->killed == THD::KILL_BAD_DATA)
+  {
     thd->killed= THD::NOT_KILLED;
+    thd->mysys_var->abort= 0;
+  }
 
   thd->command=command;
   /*