Fixed a small logic error; Updated Rust version to build against in the Docker build script

src/nettest.rs

@@ -57,7 +57,7 @@ fn ping_host(host: &str) {
 
 // timed file copy test to guage bandwidth speeds
 fn bandwidth_test(download: &str, output: &str) {
-    println!("Testing network bandwidth by downloading {}", download, output);
+    println!("Testing network bandwidth by downloading {}.", download);
 
     // get start time so we can track how long it takes to complete
     let start_time = Utc::now();