src: remove dependency on libiptc headers

xtables.h does not need really need libxtc.h, and we can drop it from
the install as it is internal-only.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/ip6tables.h b/include/ip6tables.h
index 077fee9..dfbc9b2 100644
--- a/include/ip6tables.h
+++ b/include/ip6tables.h
@@ -1,9 +1,9 @@
 #ifndef _IP6TABLES_USER_H
 #define _IP6TABLES_USER_H
 
+#include <netinet/ip.h>
 #include <xtables.h>
-
-#include "libiptc/libip6tc.h"
+#include <libiptc/libip6tc.h>
 
 #ifndef IP6T_SO_GET_REVISION_MATCH /* Old kernel source. */
 #define IP6T_SO_GET_REVISION_MATCH	68
diff --git a/include/iptables.h b/include/iptables.h
index ecc7168..99e8e1e 100644
--- a/include/iptables.h
+++ b/include/iptables.h
@@ -1,8 +1,9 @@
 #ifndef _IPTABLES_USER_H
 #define _IPTABLES_USER_H
 
-#include "xtables.h"
-#include "libiptc/libiptc.h"
+#include <netinet/ip.h>
+#include <xtables.h>
+#include <libiptc/libiptc.h>
 
 #ifndef IPT_SO_GET_REVISION_MATCH /* Old kernel source. */
 #define IPT_SO_GET_REVISION_MATCH	(IPT_BASE_CTL + 2)
diff --git a/include/libiptc/libxtc.h b/include/libiptc/libxtc.h
index 031afb5..3701018 100644
--- a/include/libiptc/libxtc.h
+++ b/include/libiptc/libxtc.h
@@ -20,8 +20,6 @@
 #define XT_ALIGN(s) (((s) + ((XT_MIN_ALIGN)-1)) & ~((XT_MIN_ALIGN)-1))
 #endif
 
-typedef char xt_chainlabel[32];
-
 #define XTC_LABEL_ACCEPT  "ACCEPT"
 #define XTC_LABEL_DROP    "DROP"
 #define XTC_LABEL_QUEUE   "QUEUE"
diff --git a/include/xtables.h.in b/include/xtables.h.in
index 4ce73e9..51cb67d 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -1,11 +1,12 @@
 #ifndef _XTABLES_H
 #define _XTABLES_H
 
+#include <sys/socket.h> /* PF_* */
 #include <sys/types.h>
+#include <stdbool.h>
+#include <net/if.h>
 #include <linux/types.h>
 #include <linux/netfilter/x_tables.h>
-#include <libiptc/libxtc.h>
-#include <stdbool.h>
 
 #ifndef IPPROTO_SCTP
 #define IPPROTO_SCTP 132
@@ -22,12 +23,14 @@
 
 #define XTABLES_API_VERSION(x,y,z)    (0x10000*(x) + 0x100*(y) + z)
 
+struct in_addr;
+
 /* Include file for additions: new matches and targets. */
 struct xtables_match
 {
 	struct xtables_match *next;
 
-	xt_chainlabel name;
+	const char *name;
 
 	/* Revision of match (0 by default). */
 	u_int8_t revision;
@@ -83,7 +86,7 @@
 {
 	struct xtables_target *next;
 
-	xt_chainlabel name;
+	const char *name;
 
 	/* Revision of target (0 by default). */
 	u_int8_t revision;