libiptc: combine common types
Make an xt_chainlabel type out of ipt_chainlabel and ip6t_chainlabel,
and add backward-API #defines. The ABI naturally does not change
either, so no soversion bump.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/include/libiptc/xtcshared.h b/include/libiptc/xtcshared.h
new file mode 100644
index 0000000..aaf87a4
--- /dev/null
+++ b/include/libiptc/xtcshared.h
@@ -0,0 +1,6 @@
+#ifndef _LIBXTC_SHARED_H
+#define _LIBXTC_SHARED_H 1
+
+typedef char xt_chainlabel[32];
+
+#endif /* _LIBXTC_SHARED_H */