* ediff-diff.el (ediff-setup-fine-diff-regions):
Allow diff options to be passed to the diff program.
- (ediff-make-diff2-buffer): Don't run Posix diff on remote files.
+ (ediff-make-diff2-buffer): Don't run POSIX diff on remote files.
(ediff-make-diff2-buffer): Refuses to diff remote files.
(ediff-make-diff2-buffer, ediff-setup-diff-regions): Changed functions.
(ediff-make-diff2-buffer): New function.