(ediff-submit-report, ediff-revision)

(ediff-submit-report, ediff-revision)
(ediff-find-file-name-handler, vc-ediff-internal, rcs-ediff-internal):
New functions.
(ediff-version-control-package): New variable.
(vc-ediff, rcs-ediff): Functions deleted.

(ediff-submit-report): New function.

(ediff-toggle-read-only, ediff-patch-file): Check out
version controlled files before their buffers are modified.
(ediff-local-checkout-flag, ediff-toggle-read-only-function): New variables.

(ediff-find-file, ediff-patch-file): Were getting
confused by symbolic links.  Fixed.