Backporting parts of

ChangeSet 1.1620.12.1 and ChangeSet 1.1625.2.1
from 4.1. This makes the slave I/O thread flush the relay log 
after every event, which provides additional safety in case
of brutal crash (reduces chances to lose a part of the relay log).


sql/repl_failsafe.cc:
  update for new prototype
sql/slave.cc:
  The slave I/O thread now flushes the relay log after writing
  every event to it, like we already do in 4.1.
sql/slave.h:
  new prototype
sql/sql_repl.cc:
  update for new prototype

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc
index 7c56670935b..cff36eaa388 100644
--- a/sql/sql_repl.cc
+++ b/sql/sql_repl.cc
@@ -958,7 +958,7 @@ int change_master(THD* thd, MASTER_INFO* mi)
              sizeof(mi->master_log_name)-1);
   }
 
-  flush_master_info(mi);
+  flush_master_info(mi, 0);
   if (need_relay_log_purge)
   {
     mi->rli.skip_log_purge= 0;