Fix -I in rcdn(1)
Fix -I in rcdn(1)

The prior fix for `-k` moved the `:` from after `I` to after `k`. Move
it back.

Frost/rcm,ali/rcm,Frost/rcm,devm33/rcm,TheLinuxKitten/rcm,fgandellini/rcm,Frost/rcm,devm33/rcm,TheLinuxKitten/rcm,fgandellini/rcm,ali/rcm,thoughtbot/rcm,fgandellini/rcm,zachlatta/rcm,ali/rcm,zachlatta/rcm,ali/rcm,tejasmanohar/rcm,Frost/rcm,devm33/rcm,TheLinuxKitten/rcm,devm33/rcm,fgandellini/rcm,TheLinuxKitten/rcm,zachlatta/rcm,tejasmanohar/rcm,zachlatta/rcm,tejasmanohar/rcm,tejasmanohar/rcm,thoughtbot/rcm,thoughtbot/rcm