client: Delete socket before opening it again (fixes a panic).

src/bin/client.rs

@@ -1,4 +1,4 @@
-use std::fs::create_dir_all;
+use std::fs::{create_dir_all, remove_file};
 use std::sync::Arc;
 use std::ffi::{OsStr, OsString};
 
@@ -75,6 +75,7 @@ async fn main() {
 
     // We create the socket before starting synchronization, so that the unwrap() below does not
     // cause corruption.
+    remove_file(paths::client_socket()).ok();
     let mut listener = UnixListener::bind(paths::client_socket()).unwrap();
     let mut incoming = listener.incoming();