iperf2: 2.0.10 -> 2.0.11

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/iperf/versions.

These checks were done:

- built on NixOS
- /nix/store/96cfq6l9jpw5jb2xfmyqsqvpx9khvaff-iperf-2.0.11/bin/iperf passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 2.0.11 with grep in /nix/store/96cfq6l9jpw5jb2xfmyqsqvpx9khvaff-iperf-2.0.11
- directory tree listing: https://gist.github.com/9e979b025f65af2cc7e8ffe313002b2f
- du listing: https://gist.github.com/68cf597a93df8e798cb97551f8303fa4

pkgs/tools/networking/iperf/2.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "iperf-2.0.10";
+  name = "iperf-2.0.11";
 
   src = fetchurl {
     url = "mirror://sourceforge/iperf2/files/${name}.tar.gz";
-    sha256 = "1whyi7lxrkllmbs7i1avc6jq8fvirn64mhx9197bf4x3rj6k9r3z";
+    sha256 = "1lm5inayc8fkqncj55fvzl9611rkmkj212lknmby7c3bgk851mmp";
   };
 
   hardeningDisable = [ "format" ];