4 small items in this:

- when we don't have in_addr_t, use uint32.
- a forgotten initialization of slave_proxy_id in sql/log_event.cc (was not really "forgot", was
"we needn't init it there", but there was one case where we needed...).
- made slave_proxy_id always meaningful in THD and Log_event, so we can
rely more on it (no need to test if it's meaningful). THD::slave_proxy_id
is equal to THD::thread_id except for the slave SQL thread.
- clean up the slave's temporary table (i.e. free their memory) when slave
server shuts down.


extra/resolveip.c:
  removed #define as it is simpler to put it in my_net.h
  (because we need the #define elsewhere)
include/my_net.h:
  When in_addr_t is not defined, use uint32.
libmysql/libmysql.c:
  using in_addr_t is more generic.
libmysql/manager.c:
  using in_addr_t is more generic.
mysql-test/t/rpl_chain_temp_table.test:
  comments
sql/log_event.cc:
  * Had forgot to initialize slave_proxy_id in the event constructor (char* buf...).
  Initializing is in fact only needed for Create_file_log_event, because
  it uses slave_proxy_id even if it does not write an event to the binlog
  (it uses slave_proxy_id to write it to SQL-LOAD.info).
  * When we write events we now always write slave_proxy_id, which is now always
  meaningful (as thd->slave_proxy_id is now always meaningful, see change in
  sql_class.cc).
sql/mini_client.cc:
  in_addr_t is more generic.
sql/slave.cc:
  A RELAY_LOG_INFO method to free the slave's temporary tables from memory
  at slave's server shutdown.
  It is called by end_slave(), which is called by close_connections(),
  which is called when the server terminates
  (close_connections() is just before clean_up(); putting the call in 
  clean_up() was buggy, as active_mi is already deleted by close_connections().
sql/slave.h:
  new method
sql/sql_class.cc:
  By default we set THD::slave_proxy_id to THD::thread_id,
  so THD::slave_proxy_id is always meaningful (not 0).
  It's always the same as the thread id except for the slave
  SQL thread.

sql/slave.cc

@@ -324,6 +324,20 @@ void init_slave_skip_errors(const char* arg)
   }
 }
 
+void st_relay_log_info::close_temporary_tables()
+{
+  TABLE *table,*next;
+
+  for (table=save_temporary_tables ; table ; table=next)
+  {
+    next=table->next;
+    /*
+      Don't ask for disk deletion. For now, anyway they will be deleted when
+      slave restarts, but it is a better intention to not delete them.
+    */
+    close_temporary(table, 0);
+  }
+}
 
 /*
   We assume we have a run lock on rli and that both slave thread
@@ -790,6 +804,7 @@ static int end_slave_on_walk(MASTER_INFO* mi, gptr /*unused*/)
 
 void end_slave()
 {
+  /* This is called when the server terminates, in close_connections(). */
   if (active_mi)
   {
     /*
@@ -3092,6 +3107,12 @@ void end_relay_log_info(RELAY_LOG_INFO* rli)
   }
   rli->inited = 0;
   rli->relay_log.close(LOG_CLOSE_INDEX | LOG_CLOSE_STOP_EVENT);
+  /*
+    Delete the slave's temporary tables from memory.
+    In the future there will be other actions than this, to ensure persistance
+    of slave's temp tables after shutdown.
+  */
+  rli->close_temporary_tables();
   DBUG_VOID_RETURN;
 }