Don't use SIG_register to register a SIG_IGN handler. It thinks it registers

a fucntion, but then it ends up calling (*1)(13) with all signals blocked
so cvs spins (with all signal blocked, getting SEGV). Use plain signal instead
To reproduce: cvs log file | less and quit.

external/gpl2/xcvs/dist/src/exithandle.c

@@ -30,7 +30,7 @@ signals_register (RETSIGTYPE (*handler)(int))
 	(void) SIG_register (SIGQUIT, handler);
 #endif
 #ifdef SIGPIPE
-	(void) SIG_register (SIGPIPE, SIG_IGN);
+	(void) signal (SIGPIPE, SIG_IGN);
 #endif
 #ifdef SIGTERM
 	(void) SIG_register (SIGTERM, handler);