Move /etc/conf.d/rc to /etc/rc.conf.

Lowercase all configurable variables, non configurations remain uppercase.
Replace rc_env_bool with rc_yesno.
Split localmount info procfs (Linux) and dumpon, savecore (BSD)

src/rc-status.c

@@ -82,7 +82,7 @@ static void print_service (char *service)
 	} else
 		snprintf (status, sizeof (status), " stopped ");
 
-	if (isatty (fileno (stdout)) && ! rc_env_bool ("RC_NOCOLOR"))
+	if (isatty (fileno (stdout)) && ! rc_yesno (getenv ("RC_NOCOLOR")))
 		printf ("\n");
 	ebracket (cols, color, status);
 }