Update mysql51-client and mysql51-server to 5.1.49.

Please refer http://dev.mysql.com/doc/refman/5.1/en/news-5-1-49.html
for full changes.

* InnoDB Plugin has been upgraded to version 1.0.10. This version is
  considered of General Availability (GA) quality.

  In this release, the InnoDB Plugin is included in source and binary
  distributions, except RHEL3, RHEL4, SuSE 9 (x86, x86_64, ia64), and
  generic Linux RPM packages. It also does not work for FreeBSD 6 and
  HP-UX or for Linux on generic ia64.

Bugs fixed:

* Security Fix: After changing the values of the innodb_file_format or
  innodb_file_per_table configuration parameters, DDL statements could
  cause a server crash. (Bug#55039)

* Security Fix: Joins involving a table with with a unique SET column
  could cause a server crash. (Bug#54575)

* Security Fix: Incorrect handling of NULL arguments could lead to a
  crash for IN() or CASE operations when NULL arguments were either
  passed explicitly as arguments (for IN()) or implicitly generated by
  the WITH ROLLUP modifier (for IN() and CASE). (Bug#54477)

* Security Fix: A malformed argument to the BINLOG statement could
  result in Valgrind warnings or a server crash. (Bug#54393)

* Security Fix: Use of TEMPORARY InnoDB tables with nullable columns
  could cause a server crash. (Bug#54044)

* Security Fix: The server could crash if there were alternate reads
  from two indexes on a table using the HANDLER interface. (Bug#54007)

* Security Fix: Using EXPLAIN with queries of the form SELECT
  ... UNION ... ORDER BY (SELECT ... WHERE ...) could cause a server
  crash. (Bug#52711)

* Security Fix: LOAD DATA INFILE did not check for SQL errors and sent
  an OK packet even when errors were already reported. Also, an assert
  related to client-server protocol checking in debug servers
  sometimes was raised when it should not have been. (Bug#52512)

(taca)