headers: make a few more headers self-contained

Sponsored by:	Rubicon Communications, LLC ("Netgate")

sys/netinet/ip_var.h

@@ -35,8 +35,11 @@
 #ifndef _NETINET_IP_VAR_H_
 #define	_NETINET_IP_VAR_H_
 
-#include <sys/queue.h>
 #include <sys/epoch.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+
+#include <netinet/in.h>
 
 /*
  * Overlay for ip header used by other protocols (tcp, udp).

sys/netinet/udp.h

@@ -36,6 +36,8 @@
 #ifndef _NETINET_UDP_H_
 #define	_NETINET_UDP_H_
 
+#include <sys/types.h>
+
 /*
  * UDP protocol header.
  * Per RFC 768, September, 1981.

sys/netinet/udp_var.h

@@ -36,6 +36,11 @@
 #ifndef _NETINET_UDP_VAR_H_
 #define	_NETINET_UDP_VAR_H_
 
+#include <sys/types.h>
+
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+
 /*
  * UDP kernel structures and variables.
  */

sys/sys/epoch.h

@@ -30,6 +30,8 @@
 #ifndef _SYS_EPOCH_H_
 #define _SYS_EPOCH_H_
 
+#include <sys/cdefs.h>
+
 struct epoch_context {
 	void   *data[2];
 } __aligned(sizeof(void *));

tools/build/test-includes/badfiles.inc

@@ -35,7 +35,6 @@ BADHDRS= \
 	sys/elf64.h \
 	sys/elf_common.h \
 	sys/elf_generic.h \
-	sys/epoch.h \
 	sys/eui64.h \
 	sys/eventhandler.h \
 	sys/eventvar.h \
@@ -267,7 +266,6 @@ BADHDRS= \
 	netinet/ip_icmp.h \
 	netinet/ip_mroute.h \
 	netinet/ip_options.h \
-	netinet/ip_var.h \
 	netinet/pim_var.h \
 	netinet/sctp_auth.h \
 	netinet/sctp_bsd_addr.h \
@@ -287,8 +285,6 @@ BADHDRS= \
 	netinet/tcp_var.h \
 	netinet/tcpip.h \
 	netinet/toecore.h \
-	netinet/udp.h \
-	netinet/udp_var.h \
 	netinet/udplite.h \
 	netinet6/icmp6.h \
 	netinet6/in6.h \