IPv6: Add traceroute6 from NetBSD

* Imported traceroute6 from NetBSD HEAD (the FreeBSD version has too
  many extensions that are not supported by Haiku, making the NetBSD a
  better fit)

Change-Id: Ie2b359f7a8dcf94b7564f02226806801feda84ce
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10205
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>

src/bin/network/Jamfile

@@ -16,3 +16,4 @@ SubInclude HAIKU_TOP src bin network route ;
 SubInclude HAIKU_TOP src bin network telnet ;
 SubInclude HAIKU_TOP src bin network telnetd ;
 SubInclude HAIKU_TOP src bin network traceroute ;
+SubInclude HAIKU_TOP src bin network traceroute6 ;

src/bin/network/traceroute6/Jamfile

@@ -0,0 +1,23 @@
+SubDir HAIKU_TOP src bin network traceroute6 ;
+
+SubDirSysHdrs $(HAIKU_TOP) headers compatibility bsd ;
+
+UseHeaders [ FDirName $(SUBDIR) .. traceroute ] : false ;
+
+SEARCH_SOURCE += [ FDirName $(SUBDIR) .. traceroute ] ;
+
+Application traceroute6 :
+	as.c
+	traceroute6.c
+	: $(TARGET_NETWORK_LIBS) $(TARGET_SELECT_UNAME_ETC_LIB) libbsd.so ;
+
+# Installation -- in the test directory for the time being
+HaikuInstall install-networking
+	: [ FDirName $(HAIKU_TEST_DIR) kits net ]
+	: traceroute6 ;
+
+HaikuInstall install-userland-networking
+	: [ FDirName $(HAIKU_TEST_DIR) kits net userland ]
+	: traceroute6
+	: installed-userland-networking
+;