pflogd: Work around fallout from libpcap 1.10.5

struct pcap_timeval and pcap_sf_pkthdr are no longer exposed. Add local
declarations as done for racoon/dump.c.

Note that pcap_timeval:tv_{,u}sec are converted to unsigned for 1.10.5,
without changing header magic number. These are already unsigned for
racoon/dump.c somehow...

XXX
There's no ATF/regress test for pf, and this patch is totally untested.

Author: rokuyama

dist/pf/sbin/pflogd/pflogd.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: pflogd.c,v 1.12 2023/08/19 14:56:22 christos Exp $	*/
+/*	$NetBSD: pflogd.c,v 1.13 2024/09/03 09:03:18 rin Exp $	*/
 /*	$OpenBSD: pflogd.c,v 1.45 2007/06/06 14:11:26 henning Exp $	*/
 
 /*
@@ -107,6 +107,20 @@ static size_t bufleft = 0;	/* bytes left in buffer */
 static int suspended = -1;
 static long packets_dropped = 0;
 
+/*
+ * XXX Taken from libpcap. These are no longer exposed for >= 1.10.5,
+ * for which tv_{,u}sec were converted to unsigned.
+ */
+struct pcap_timeval {
+	uint32_t tv_sec;
+	uint32_t tv_usec;
+};
+struct pcap_sf_pkthdr {
+	struct pcap_timeval ts;
+	uint32_t caplen;
+	uint32_t len;
+};
+
 void
 set_suspended(int s)
 {