feat: Add names to IO threads

This would have sped up debugging #243 had it already been implemented,
and other threads are named, so I'm guessing the lack of a name is an
oversight.

Author: Jason M. Miller

libshpool/src/protocol.rs

@@ -249,7 +249,9 @@ impl Client {
         let exit_status = AtomicI32::new(1);
         thread::scope(|s| {
             // stdin -> sock
-            let stdin_to_sock_h = s.spawn(|| -> anyhow::Result<()> {
+            let stdin_to_sock_h = thread::Builder::new()
+                .name("stdin_to_sock".to_string())
+                .spawn_scoped(s,|| -> anyhow::Result<()> {
                 let _s = span!(Level::INFO, "stdin->sock").entered();
                 let mut stdin = std::io::stdin().lock();
                 let mut buf = vec![0; consts::BUF_SIZE];
@@ -267,10 +269,12 @@ impl Client {
                     write_client_stream.write_all(to_write)?;
                     write_client_stream.flush().context("flushing client")?;
                 }
-            });
+            }).unwrap();
 
             // sock -> stdout
-            let sock_to_stdout_h = s.spawn(|| -> anyhow::Result<()> {
+            let sock_to_stdout_h = thread::Builder::new()
+                .name("sock_to_stdout".to_string())
+                .spawn_scoped(s, || -> anyhow::Result<()> {
                 let _s = span!(Level::INFO, "sock->stdout").entered();
 
                 let mut stdout = std::io::stdout().lock();
@@ -323,7 +327,7 @@ impl Client {
                         }
                     }
                 }
-            });
+            }).unwrap();
 
             loop {
                 let mut nfinished_threads = 0;