Added new 'V' (voting) restriction flag.

text/menu/restrict.asc

-A=ANSI              H=                  O=                  V=
+A=ANSI              H=                  O=                  V=Voting
 B=Beep              I=                  P=Post              W=Auto-message
 C=Chat              J=Quoting           Q=QWK Network Node  X=External Programs
 D=Download          K=Read Mail Sent    R=Remove Files      Y=