Multiple result sets from stored procedures now works with the
mysql and mysqltest clients.


client/mysqltest.c:
  Post-merge fixes.
mysql-test/r/index_merge_innodb.result:
  Post-merge fixes.
mysql-test/r/sp-error.result:
  Post-merge fixes.
  Removed now obsolete error test for multiple selects (without "into").
mysql-test/r/sp.result:
  Post-merge fixes.
  Added test for mulple result sets.
mysql-test/r/variables.result:
  Post-merge fixes.
mysql-test/t/index_merge_innodb.test:
  Post-merge fixes.
mysql-test/t/sp-error.test:
  Post-merge fixes.
  Removed now obsolete error test for multiple selects (without "into").
mysql-test/t/sp.test:
  Post-merge fixes.
  Added test for mulple result sets.
sql/lex.h:
  Post-merge fixes.