RCSciArgs and RCScoArgs. They have fine defaults, but note carefully:

  WHEN YOU UPGRADE TO 2.714, YOU MUST BE CERTAIN TO PASS THROUGH THE "Define
  Configuration Parameters" PAGE.

  You shouldn't have to actually define any parameters; the defaults are
  fine if you use GNU RCS. But you must pass through that page to get the
  args defined; otherwise RCS will get called with empty options and will
  end up making a mess of things. (A reversible mess, but a mess
  nonetheless.)

  If, when you upgrade, you consistently follow the directions (go to the
  installer page and check off the newly-unchecked boxes), you'll be fine. I
  discovered this problem because I cheated and just checked the "Mark the
  config file as upgraded" box, to make the "admin must run installer"
  message go away. :v)