vchoi_fork

[svn-r10979] Purpose:
Renamed file_handle.c as vfd.c since its tests have evloved from
merely file handles tests to other basic features of VFD's.
Did some minor cosmetic changes in vfd.c.

Updated Makefile.am with the new name.
Makefile.in is regenerated.

Platforms tested:
In heping only since the changes are trivial.

Misc. update: