ip: support for the LOWER_UP flag by Natanael Copa <natanael.copa@gmail.com>.
~50 bytes code growth.

diff --git a/networking/libiproute/ipaddress.c b/networking/libiproute/ipaddress.c
index 3bf854e..07b2787 100644
--- a/networking/libiproute/ipaddress.c
+++ b/networking/libiproute/ipaddress.c
@@ -18,6 +18,10 @@
 #include "rt_names.h"
 #include "utils.h"
 
+#ifndef IFF_LOWER_UP
+/* from linux/if.h */
+#define IFF_LOWER_UP	0x10000		/* driver signals L1 up*/
+#endif
 
 typedef struct filter_t {
 	char *label;
@@ -63,6 +67,7 @@
 	_PF(NOTRAILERS);
 #endif
 	_PF(UP);
+	_PF(LOWER_UP);
 #undef _PF
 	if (flags)
 		printf("%x", flags);