Address gosec findings

Mostly handling unhandled errors appropriately.
If logging to STDERR fails, we panic. Added #nosec
comments to findings we are OK with.

http.go

@@ -124,7 +124,13 @@ func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
 	if err != nil {
 		return
 	}
-	tc.SetKeepAlive(true)
-	tc.SetKeepAlivePeriod(3 * time.Minute)
+	err = tc.SetKeepAlive(true)
+	if err != nil {
+		return nil, err
+	}
+	err = tc.SetKeepAlivePeriod(3 * time.Minute)
+	if err != nil {
+		return nil, err
+	}
 	return tc, nil
 }