Makefile: Added cleandir target.

Makefile: Added cleandir target.
chgpasswd.c: Added patch from Roland Haag <haag@think.de> to allow
             password changes to be done more than once.
loadparm.c: Added entries for the "directory mode/directory mask parameters".
            Changed default file mode to 644.
proto.h: Added sys_gethostbyname.
server.c: Added directory mode changes.
system.c: Added sys_gethostbyname.
trans2.c: Added NT_FILE_ATTRIBUTE_NORMAL patch from Roger Orr
          <rorr@csfp.csfb.com>
trans2.h: Defined NT_FILE_ATTRIBUTE_NORMAL for above patch.
util.c: Changes calls to gethostbyname to sys_gethostbyname.
jra@cygnus.com
(This used to be commit d8d8a7ee00971fca7a8d079bfb547af107df35a4)