conman: init at 0.3.1

Adding this package along with a service. https://github.com/dun/conman/releases/tag/conman-0.3.1

Changes to conman package as per review

Enabled parallel building for the conman package

pkgs/by-name/co/conman/package.nix

@@ -0,0 +1,45 @@
+{
+  lib,
+  freeipmi,
+  autoreconfHook,
+  pkg-config,
+  fetchFromGitHub,
+  tcp_wrappers,
+  stdenv,
+  expect,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "conman";
+  version = "0.3.1";
+
+  src = fetchFromGitHub {
+    owner = "dun";
+    repo = "conman";
+    tag = "conman-${finalAttrs.version}";
+    hash = "sha256-CHWvHYTmTiEpEfHm3TF5aCKBOW2GsT9Vv4ehpj775NQ=";
+  };
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+
+  buildInputs = [
+    freeipmi # For libipmiconsole.so.2
+    tcp_wrappers # For libwrap.so.0
+    expect # For conman/*.exp scripts
+  ];
+
+  meta = {
+    description = "The Console Manager";
+    homepage = "https://github.com/dun/conman";
+    license = lib.licenses.gpl3Plus;
+    platforms = lib.platforms.linux;
+    maintainers = with lib.maintainers; [
+      frantathefranta
+    ];
+  };
+
+})