Report the correct length of the datagram to the kernel to fix strange behavior
in the syslog function.
--- musl-0.9.9/src/misc/syslog.c
+++ src/src/misc/syslog.c
@@ -90,9 +90,11 @@
 		priority, timebuf,
 		log_ident ? log_ident : "",
 		"["+!pid, pid, "]"+!pid);
+	if (l > sizeof buf) l = sizeof buf - 1;
 	l2 = vsnprintf(buf+l, sizeof buf - l, message, ap);
 	if (l2 >= 0) {
 		l += l2;
+		if (l > sizeof buf) l = sizeof buf - 1;
 		if (buf[l-1] != '\n') buf[l++] = '\n';
 		sendto(log_fd, buf, l, 0, (void *)&log_addr, 11);
 	}