On FreeBSD, the loopback interface is normally called lo0.

PR:		62358
Submitted by:	Sanatana Dharma

net/p0f/files/patch-p0f.c

@@ -0,0 +1,15 @@
+$FreeBSD$
+On FreeBSD, the loopback interface is normally called lo0.
+author:  Sanatana Dharma
+
+--- p0f.c.orig	Mon Oct 13 18:57:21 2003
++++ p0f.c	Tue Feb 17 20:56:15 2004
+@@ -1590,7 +1590,7 @@ int main(int argc,char** argv) {
+     if (!use_iface) use_iface=pcap_lookupdev(errbuf);
+ #endif /* ^WIN32 */
+ 
+-    if (!use_iface) use_iface = "lo";
++    if (!use_iface) use_iface = "lo0";
+ 
+     /* We do not rely on pcap timeouts - they suck really bad. Of
+        course, the documentation sucks, and if you use the timeout