Revert "Try to fix mysterious test failures on Travis"

This reverts commit 71fe85d.

See PuerkitoBio/purell#5
for the cause of the mysterious `go test -v ./...` failure.

commands/server.go

@@ -146,7 +146,7 @@ func fixUrl(s string) (string, error) {
 	if !strings.HasPrefix(s, "http://") && !strings.HasPrefix(s, "https://") {
 		s = "http://" + s
 	}
-	if len(s) > 0 && !strings.HasSuffix(s, "/") {
+	if !strings.HasSuffix(s, "/") {
 		s = s + "/"
 	}
 	u, err := url.Parse(s)