openssh: 7.2p2 -> 7.3p1 (#17493)

Also remove patch for CVE-2015-8325 that has been fixed upstream.

pkgs/tools/networking/openssh/default.nix

@@ -27,11 +27,12 @@ with stdenv.lib;
 stdenv.mkDerivation rec {
   # Please ensure that openssh_with_kerberos still builds when
   # bumping the version here!
-  name = "openssh-7.2p2";
+  name = "openssh-${version}";
+  version = "7.3p1";
 
   src = fetchurl {
     url = "mirror://openbsd/OpenSSH/portable/${name}.tar.gz";
-    sha256 = "132lh9aanb0wkisji1d6cmsxi520m8nh7c7i9wi6m1s3l38q29x7";
+    sha256 = "1k5y1wi29d47cgizbryxrhc1fbjsba2x8l5mqfa9b9nadnd9iyrz";
   };
 
   prePatch = optionalString hpnSupport
@@ -44,7 +45,6 @@ stdenv.mkDerivation rec {
     [
       ./locale_archive.patch
       ./fix-host-key-algorithms-plus.patch
-      ./CVE-2015-8325.patch
 
       # See discussion in https://github.com/NixOS/nixpkgs/pull/16966
       ./dont_create_privsep_path.patch