+Ported to 5.1.42
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
-@@ -430,6 +430,7 @@
+@@ -434,6 +434,7 @@
MYSQL_PLUGIN_IMPORT uint opt_debug_sync_timeout= 0;
#endif /* defined(ENABLED_DEBUG_SYNC) */
my_bool opt_old_style_user_limits= 0, trust_function_creators= 0;
DBUG_RETURN(HA_POS_ERROR); /* This shouldn't happend */
--- a/sql/sys_vars.cc
+++ b/sql/sys_vars.cc
-@@ -2180,6 +2180,12 @@
+@@ -2259,6 +2259,12 @@
VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)),
DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1));