Merge trift2.:/MySQL/M40/clone-4.0

into  trift2.:/MySQL/M41/merge-4.1


include/config-win.h:
  Auto merged
mysys/my_pthread.c:
  Auto merged
mysys/thr_alarm.c:
  Auto merged
mysys/my_thr_init.c:
  Not applicable to 4.1 in its current state.
sql/mysqld.cc:
  Change was a backport already, null-merged to 4.1.

mysys/thr_alarm.c

@@ -36,7 +36,6 @@
 #define ETIME ETIMEDOUT
 #endif
 
-uint thr_client_alarm;
 static int alarm_aborted=1;			/* No alarm thread */
 my_bool thr_alarm_inited= 0;
 volatile my_bool alarm_thread_running= 0;