Do not attempt to serve on "well-known" ports (#824)

components/utils/src/net.rs

@@ -1,7 +1,9 @@
 use std::net::TcpListener;
 
 pub fn get_available_port(avoid: u16) -> Option<u16> {
-    (1000..9000).find(|port| *port != avoid && port_is_available(*port))
+    // Start after "well-known" ports (0–1023) as they require superuser
+    // privileges on UNIX-like operating systems.
+    (1024..9000).find(|port| *port != avoid && port_is_available(*port))
 }
 
 pub fn port_is_available(port: u16) -> bool {