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

kernel/scheme/pipe.rs

@@ -42,7 +42,7 @@ pub fn pipe(flags: usize) -> (usize, usize) {
 pub struct PipeScheme;
 
 impl Scheme for PipeScheme {
-    fn dup(&self, id: usize) -> Result<usize> {
+    fn dup(&self, id: usize, _buf: &[u8]) -> Result<usize> {
         let mut pipes = pipes_mut();
 
         let read_option = pipes.0.get(&id).map(|pipe| pipe.clone());