Reverse my previous change, "::" is a GNU getopt extension that allows

an optional argument.
Looks like a glibc bug to me

sysklogd/syslogd.c

@@ -31,6 +31,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <getopt.h>
 #include <netdb.h>
 #include <paths.h>
 #include <signal.h>
@@ -631,7 +632,7 @@ extern int syslogd_main(int argc, char **argv)
 	char *p;
 
 	/* do normal option parsing */
-	while ((opt = getopt(argc, argv, "m:nO:s:Sb:R:LC:")) > 0) {
+	while ((opt = getopt(argc, argv, "m:nO:s:Sb:R:LC::")) > 0) {
 		switch (opt) {
 		case 'm':
 			MarkInterval = atoi(optarg) * 60;