Merge with MySQL 5.1.55

- Fixed some issues with partitions and connection_string, which also fixed lp:716890 "Pre- and post-recovery crash in Aria"
- Fixed wrong assert in Aria

Now need to merge with latest xtradb before pushing 

sql/ha_partition.cc:
  Ensure that m_ordered_rec_buffer is not freed before close.
sql/mysqld.cc:
  Changed to use opt_stack_trace instead of opt_pstack.
  Removed references to pstack
sql/partition_element.h:
  Ensure that connect_string is initialized
storage/maria/ma_key_recover.c:
  Fixed wrong assert

1 files changed, 25 insertions, 0 deletions

diff --git a/mysql-test/t/connect.test b/mysql-test/t/connect.test
index 255a4634bca..671f7baa61e 100644
--- a/mysql-test/t/connect.test
+++ b/mysql-test/t/connect.test
@@ -320,6 +320,31 @@ if ($error)
   --echo # -- Success: more than --extra-max-connections + 1 normal connections not possible
 }
 
+###########################################################################
+
+--echo #
+--echo # -- Bug#49752: 2469.126.2 unintentionally breaks authentication
+--echo #               against MySQL 5.1 server
+--echo #
+
+GRANT ALL ON test.* TO 'Azundris12345678'@'localhost' IDENTIFIED BY 'test123';
+
+FLUSH PRIVILEGES;
+
+--replace_result $MASTER_MYSOCK MASTER_SOCKET $MASTER_MYPORT MASTER_PORT
+connect (con1,localhost,Azundris123456789,test123,test);
+disconnect con1;
+
+connection default;
+
+DROP USER 'Azundris12345678'@'localhost';
+
+FLUSH PRIVILEGES;
+
+--echo #
+--echo # -- End of Bug#49752
+--echo #
+
 --echo # ------------------------------------------------------------------
 --echo # -- End of 5.1 tests
 --echo # ------------------------------------------------------------------