Don't force repair of tables that are not closed properly.


Docs/manual.texi:
  Added information about symbolic links.
include/my_sys.h:
  symbolic link support
myisam/mi_check.c:
  Don't force repair of tables that are not closed properly.
myisam/myisamchk.c:
  Version number change.
mysys/my_static.c:
  symbolic link support
mysys/my_symlink2.c:
  Disabling of symbolic link support
sql/mysqld.cc:
  Disabling of symbolic link support