rcs: State option

 
 2.1.6 State option
 ------------------
 
 Some commands accept an option of the form ‘-sSTATE’ to specify a state
 (⇒ci, ⇒co).  For frob (⇒rcs), you can also specify
 a revision.  For log (⇒rlog), you can specify more than one state
 (⇒Delim-separated list).
 
    RCS uses ‘Exp’ (for “experimental”) as the default state, but does
 not attach any meaning to it or any state you choose.  Other common
 states are ‘Rel’ (for “release”), ‘Prod’ (for “production”), ‘Stable’,
 and so on.  A state should be an ‘id’ (“identifier”, ⇒comma-v
 grammar).