Log Message:
Update to 1.9.4.

Bugs fixed in 1.9.4:

* Longstanding bugs:

  - Portability nits in install-sh and mdata-sh.

  - Don't let `make install' fails if a _JAVA primary becomes empty
    because of conditionals.

  - Do not confuse CHANGELOG with ChangeLog on case-insensitive
    case-preserving file systems (likewise for all automatically
    distributed files).

  - Do not embed $DESTDIR in Python's byte-code files.

  - Work around programs that read stdin when checking for --version
    and --help options (when the `std-options' is used).

  - Fix AM_PATH_PYTHON to correctly define PYTHON as `:' when no minimum
    version was supplied and no interpreter is found.

* Noteworthy manual updates:

  - Conditional Subdirectories: more comments about non-distributed
    subdirectories.

  - Flag Variables Ordering: new FAQ entry.

  - Per-Object Flags: new FAQ entry.