accept/recvfrom take pointers to socklen_t's

http://lists.infodrom.org/infodrom-sysklogd/2006/0011.html

--- syslogd.c
+++ syslogd.c
@@ -841,7 +841,7 @@
 	int len, num_fds;
 #else /* __GLIBC__ */
 #ifndef TESTING
-	size_t len;
+	socklen_t len;
 #endif
 	int num_fds;
 #endif /* __GLIBC__ */