restore: networking stack files from reflog (Phases 1-6)

Recovered from reflog commits 1c80937e and d0ecc067 after force-push data loss.
Includes: filter/, icmp_error.rs, slaac.rs, bond.rs, bridge.rs, gre.rs, ipip.rs,
qdisc.rs, tun.rs, vlan.rs, vxlan.rs, netfilter.rs, tun.rs, conntrack.rs, nat.rs,
rule.rs, table.rs, redbear-ufw/, dhcpv6d/, netdiag/ — 39 files total.

Cargo.lock

@@ -573,6 +573,10 @@ dependencies = [
 name = "dhcpd"
 version = "0.0.0"
 
+[[package]]
+name = "dhcpv6d"
+version = "0.1.0"
+
 [[package]]
 name = "digest"
 version = "0.8.1"
@@ -1912,6 +1916,14 @@ dependencies = [
  "rand_core 0.3.1",
 ]
 
+[[package]]
+name = "redbear-netdiag"
+version = "0.1.0"
+
+[[package]]
+name = "redbear-ufw"
+version = "0.1.0"
+
 [[package]]
 name = "redox-initfs"
 version = "0.2.0"
@@ -2520,7 +2532,11 @@ checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
 [[package]]
 name = "usb-core"
+<<<<<<< HEAD
 version = "0.2.5"
+=======
+version = "0.3.0"
+>>>>>>> 1c80937e (networking: comprehensive TCP/IP stack implementation (Phases 1-6))
 
 [[package]]
 name = "usbctl"