openssh: security 7.3p1 -> 7.4p1

The two removed patches were for issues that should've been fixed.
Minor vulnerabilities addressed: CVE-2016-{10009,10010,10011,10012}.
https://www.openssh.com/txt/release-7.4

pkgs/tools/networking/openssh/RH-1380296-NEWKEYS-null-pointer-deref.patch

@@ -1,37 +0,0 @@
-diff --git a/kex.c b/kex.c
-index 50c7a0f..823668b 100644
---- a/kex.c
-+++ b/kex.c
-@@ -419,6 +419,8 @@ kex_input_newkeys(int type, u_int32_t seq, void *ctxt)
- 	ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_protocol_error);
- 	if ((r = sshpkt_get_end(ssh)) != 0)
- 		return r;
-+        if ((r = ssh_set_newkeys(ssh, MODE_IN)) != 0)
-+          return r;
- 	kex->done = 1;
- 	sshbuf_reset(kex->peer);
- 	/* sshbuf_reset(kex->my); */
-diff --git a/packet.c b/packet.c
-index d6dad2d..f96566b 100644
---- a/packet.c
-+++ b/packet.c
-@@ -38,7 +38,7 @@
-  */
- 
- #include "includes.h"
-- 
-+
- #include <sys/param.h>	/* MIN roundup */
- #include <sys/types.h>
- #include "openbsd-compat/sys-queue.h"
-@@ -1907,9 +1907,7 @@ ssh_packet_read_poll2(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p)
- 			return r;
- 		return SSH_ERR_PROTOCOL_ERROR;
- 	}
--	if (*typep == SSH2_MSG_NEWKEYS)
--		r = ssh_set_newkeys(ssh, MODE_IN);
--	else if (*typep == SSH2_MSG_USERAUTH_SUCCESS && !state->server_side)
-+	if (*typep == SSH2_MSG_USERAUTH_SUCCESS && !state->server_side)
- 		r = ssh_packet_enable_delayed_compress(ssh);
- 	else
- 		r = 0;

pkgs/tools/networking/openssh/default.nix

@@ -29,11 +29,11 @@ stdenv.mkDerivation rec {
   # Please ensure that openssh_with_kerberos still builds when
   # bumping the version here!
   name = "openssh-${version}";
-  version = "7.3p1";
+  version = "7.4p1";
 
   src = fetchurl {
     url = "mirror://openbsd/OpenSSH/portable/${name}.tar.gz";
-    sha256 = "1k5y1wi29d47cgizbryxrhc1fbjsba2x8l5mqfa9b9nadnd9iyrz";
+    sha256 = "1l8r3x4fr2kb6xm95s7kjdif1wp6f94d4kljh4qjj9109shw87qv";
   };
 
   prePatch = optionalString hpnSupport
@@ -44,13 +44,11 @@ stdenv.mkDerivation rec {
 
   patches =
     [
-      ./RH-1380296-NEWKEYS-null-pointer-deref.patch
       ./locale_archive.patch
       ./fix-host-key-algorithms-plus.patch
 
       # See discussion in https://github.com/NixOS/nixpkgs/pull/16966
       ./dont_create_privsep_path.patch
-      ./fix-CVE-2016-8858.patch
     ]
     ++ optional withGssapiPatches gssapiSrc;
 

pkgs/tools/networking/openssh/fix-CVE-2016-8858.patch

@@ -1,11 +0,0 @@
-diff -u -r1.126 -r1.127
---- ssh/kex.c	2016/09/28 21:44:52	1.126
-+++ ssh/kex.c	2016/10/10 19:28:48	1.127
-@@ -461,6 +461,7 @@
- 	if (kex == NULL)
- 		return SSH_ERR_INVALID_ARGUMENT;
- 
-+	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL);
- 	ptr = sshpkt_ptr(ssh, &dlen);
- 	if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
- 		return r;