Redo networking (#22)

* Rewriting network functions

* Add buffer to dup
Fix non-blocking handling by triggering once on enabling events to read to EOF

* Modifications for UDP API

* Implement TCP client side

* Add active close

* Add DMAR parser

* Implement basic TCP listening. Need to improve the state machine

* Reduce debugging

* Fixes for close procedure

* Updates to fix path processing in libstd

filesystem/etc/init.rc

@@ -1,7 +1,6 @@
 randd
 initfs:bin/pcid /etc/pcid.toml
 ethernetd
-arpd
 ipd
 tcpd
 udpd