Implement the http variant of the bank server.

During that process, many shortcomings with the socket server and the
bank lib were fixed.

I am aware a massive commit like this is not ideal.

socket-server/src/server.rs

@@ -33,7 +33,11 @@ pub fn run(host: &str, threads: usize) -> Result<()> {
     Ok(())
 }
 
-fn handle_connection(bank: Arc<RwLock<Bank>>, cmds: &Commands, mut stream: TcpStream) -> Result<()> {
+fn handle_connection(
+    bank: Arc<RwLock<Bank>>,
+    cmds: &Commands,
+    mut stream: TcpStream,
+) -> Result<()> {
     const BUF_SIZE: usize = 64;
 
     let mut data: Vec<u8> = vec![];
@@ -58,4 +62,3 @@ fn handle_connection(bank: Arc<RwLock<Bank>>, cmds: &Commands, mut stream: TcpSt
 
     Ok(())
 }
-