libmysqld/Makefile.am:
  sql_unions -> sql_union
BitKeeper/etc/ignore:
  Added libmysqld/sql_union.cc to the ignore list
mysql-test/mysql-test-run.sh:
  fix to get path-independent logging
mysql-test/r/rpl_log.result:
  fix for path-independent logging
sql/log.cc:
  fixed compile error with USING_TRANSACTIONS
sql/log_event.h:
  fixed compile error with USING_TRANSACTIONS