GitLab

Prompt user for a file rather than raising an error.
(cvs-enabledp): Fix call to cvs-mode-marked.
(cvs-insert-file): New function (extracted from cvs-mode-insert).
(cvs-mode-insert): Use it.  Change the init prompt' value.
(cvs-mode-tree): Use cvs-status-cvstrees instead of cvs-status-trees.