Docs/manual.texi:
  Changed name mysql_multi_mysqld to mysqld_multi.
  This is because safe_mysqld will be converted to mysqld_safe
  in the future and the new name is shorter than the old one.
scripts/Makefile.am:
  Added mysqld_multi
scripts/mysqld_multi.sh:
  Changed name from mysql_multi_mysqld to mysqld_multi