Docs/manual.texi:
  Fulltext manual changed, MERGE bug added to changelog
myisammrg/mymrgdef.h:
  MERGE bug fixed
myisammrg/myrg_rkey.c:
  MERGE bug fixed
myisammrg/myrg_rnext.c:
  MERGE bug fixed
myisammrg/myrg_rprev.c:
  MERGE bug fixed
mysql-test/r/merge.result:
  MERGE bug fixed
mysql-test/t/merge.test:
  MERGE bug fixed