kernel and servers send diagnostic messages to IS; IS sends them to TTY

and the new log driver if enabled.

new usyslogd is started from /usr/etc/rc. New device created by
MAKEDEV.sh. /var/log created by etc/mtree/minix.tree (on root for
now). Made select() slightly more generic, with less code duplication.

test/select/test00.c

@@ -23,6 +23,18 @@ int main(int argc, char *argv[]) {
 	int i,j;	
 
 	FD_ZERO(&fds);
+	for (i=0;i<FD_SETSIZE;i++) {
+		/* see if SET works */
+		FD_SET(i, &fds);
+		if(!FD_ISSET(i, &fds))
+			return 1;
+	}
+	FD_ZERO(&fds);
+	for (i=0;i<FD_SETSIZE;i++) {
+		/* see if ZERO works */
+		if(FD_ISSET(i, &fds))
+			return 1;
+	}
 	for (i=0;i<FD_SETSIZE;i++) {
 		FD_SET(i, &fds);
 		for(j = 0; j <= i; j++)