linux_5_9: remove

Linux 5.9.x is in upstream now, thus remove.  We continue pointing
linuxPackages_latest to linux_5_9, though, since this still points to
linux_5_8 upstream.

default.nix

@@ -10,16 +10,9 @@ with self; rec {
 
   janus-gateway = callPackage ./pkgs/janus-gateway { };
 
-  nextcloud-spreed-signaling = callPackage ./pkgs/nextcloud-spreed-signaling { };
-
-  linux_5_9 = callPackage ./pkgs/linux/linux-5.9.nix {
-    kernelPatches = [
-      kernelPatches.bridge_stp_helper
-      kernelPatches.request_key_helper
-      kernelPatches.export_kernel_fpu_functions."5.3"
-    ];
-  };
-  linuxPackages_5_9 = recurseIntoAttrs (linuxPackagesFor linux_5_9);
   linuxPackages_latest = linuxPackages_5_9;
 
+  nextcloud-spreed-signaling = callPackage ./pkgs/nextcloud-spreed-signaling { };
+
+  usrsctp = callPackage ./pkgs/usrsctp { };
 }

pkgs/janus-gateway/default.nix

@@ -4,7 +4,7 @@
 , libnice
 , openssl
 , srtp
-#, usrsctp
+, usrsctp
 , libmicrohttpd
 , libwebsockets
 , gnumake
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     libnice
     openssl
     srtp
-    #usrsctp
+    usrsctp
     libmicrohttpd
     libwebsockets
     gnumake

pkgs/linux/linux-5.9.nix

@@ -1,18 +0,0 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
-
-with stdenv.lib;
-
-buildLinux (args // rec {
-  version = "5.9.6";
-
-  # modDirVersion needs to be x.y.z, will automatically add .0 if needed
-  modDirVersion = if (modDirVersionArg == null) then concatStringsSep "." (take 3 (splitVersion "${version}.0")) else modDirVersionArg;
-
-  # branchVersion needs to be x.y
-  extraMeta.branch = versions.majorMinor version;
-
-  src = fetchurl {
-    url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
-    sha256 = "0w2kcng09nzk09dwkx4azdfgnwzbd2mz8lyl4j69bwx837z85hbc";
-  };
-} // (args.argsOverride or {}))

pkgs/usrsctp/default.nix

@@ -0,0 +1,29 @@
+{ stdenv, lib, fetchFromGitHub, which, libtool, autoconf, automake }:
+
+let
+  version = "2020-11-04";
+  rev = "4098a99f47eb7145f6f7ce0b66a19f6b1b13ebfa";
+  sha256 = "1mfaz4ya5c2k1cpn5id4312qb9ni5sp9j7c57jxcfjx7bkds6k17";
+in stdenv.mkDerivation rec {
+  pname = "usrsctp-unstable";
+  inherit version;
+
+  src = fetchFromGitHub {
+    owner = "sctplab";
+    repo = "usrsctp";
+    inherit rev sha256;
+  };
+
+  nativeBuildInputs = [
+    which
+    libtool
+    autoconf
+    automake
+  ];
+
+  hardeningDisable = [
+    "fortify"
+  ];
+
+  preConfigure = "./bootstrap";
+}