(cvs-parse-process): Don't blindly refresh all cookies.

(cvs-parse-process): Don't blindly refresh all cookies.
(cvs-cleanup-removed): New function.
(cvs-cleanup-functions): New var.
(cvs-cleanup-collection): Use cvs-cleanup-functions to allow the user
some flexibility in specifying additional entries to auto-cleanup.
(cvs-quickdir): New function.
(cvs-mode-insert): Use cvs-fileinfo-from-entries.
(cvs-mode-imerge): Use smerge-ediff rather than vc-resolve-conflicts.
(cvs-mode-find-file): Check that we are on a filename or dirname
when invoked through a mouse-click.
(cvs-full-path): Remove.
(cvs-dired-action): Re-introduced.
(cvs-dired-noselect): Use it.
(vc-post-command-functions): use this new hook if available.