sessreg: refactor and move to pkgs/by-name from xorg namespace

pkgs/by-name/se/sessreg/package.nix

···
+{
+  lib,
+  stdenv,
+  fetchurl,
+  pkg-config,
+  xorgproto,
+  writeScript,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "sessreg";
+  version = "1.1.3";
+
+  src = fetchurl {
+    url = "mirror://xorg/individual/app/sessreg-${finalAttrs.version}.tar.xz";
+    hash = "sha256-AirNXegHfd3E+RmWH3nhAuzV8yKKMzaBr1zQ5zRPrMI=";
+  };
+
+  strictDeps = true;
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ xorgproto ];
+
+  passthru = {
+    updateScript = writeScript "update-${finalAttrs.pname}" ''
+      #!/usr/bin/env nix-shell
+      #!nix-shell -i bash -p common-updater-scripts
+      version="$(list-directory-versions --pname ${finalAttrs.pname} \
+        --url https://xorg.freedesktop.org/releases/individual/app/ \
+        | sort -V | tail -n1)"
+      update-source-version ${finalAttrs.pname} "$version"
+    '';
+  };
+
+  meta = {
+    description = "Utility to manage utmp & wtmp entries for X sessions";
+    homepage = "https://gitlab.freedesktop.org/xorg/app/sessreg";
+    license = with lib.licenses; [
+      mitOpenGroup
+      mit
+    ];
+    mainProgram = "sessreg";
+    maintainers = [ ];
+    platforms = lib.platforms.unix;
+  };
+})

pkgs/servers/x11/xorg/default.nix

···
   luit,
   makedepend,
   pixman,
+  sessreg,
   util-macros,
   xbitmaps,
   xcb-proto,
···
     luit
     makedepend
     pixman
+    sessreg
     xbitmaps
     xorgproto
     xtrans
···
         libXmu
         libXt
       ];
-      passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
-      meta = {
-        pkgConfigModules = [ ];
-        platforms = lib.platforms.unix;
-      };
-    })
-  ) { };
-
-  # THIS IS A GENERATED FILE.  DO NOT EDIT!
-  sessreg = callPackage (
-    {
-      stdenv,
-      pkg-config,
-      fetchurl,
-      xorgproto,
-      testers,
-    }:
-    stdenv.mkDerivation (finalAttrs: {
-      pname = "sessreg";
-      version = "1.1.3";
-      builder = ./builder.sh;
-      src = fetchurl {
-        url = "mirror://xorg/individual/app/sessreg-1.1.3.tar.xz";
-        sha256 = "1hmc9wsfgl2wmy0kccwa4brxbv02w5wiz5hrz72dsz87x1fwsah2";
-      };
-      hardeningDisable = [
-        "bindnow"
-        "relro"
-      ];
-      strictDeps = true;
-      nativeBuildInputs = [ pkg-config ];
-      buildInputs = [ xorgproto ];
       passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
       meta = {
         pkgConfigModules = [ ];

pkgs/servers/x11/xorg/generate-expr-from-tarballs.pl

···
   luit,
   makedepend,
   pixman,
+  sessreg,
   util-macros,
   xbitmaps,
   xcb-proto,
···
     luit
     makedepend
     pixman
+    sessreg
     xbitmaps
     xorgproto
     xtrans

pkgs/servers/x11/xorg/overrides.nix

···
     };
   });
 
-  sessreg = super.sessreg.overrideAttrs (attrs: {
-    preBuild = "sed -i 's|gcc -E|gcc -E -P|' man/Makefile";
-    meta = attrs.meta // {
-      mainProgram = "sessreg";
-    };
-  });
-
   xrandr = super.xrandr.overrideAttrs (attrs: {
     postInstall = ''
       rm $out/bin/xkeystone

pkgs/servers/x11/xorg/tarballs.list

···
 mirror://xorg/individual/app/listres-1.0.6.tar.xz
 mirror://xorg/individual/app/mkfontscale-1.2.3.tar.xz
 mirror://xorg/individual/app/oclock-1.0.5.tar.xz
-mirror://xorg/individual/app/sessreg-1.1.3.tar.xz
 mirror://xorg/individual/app/setxkbmap-1.3.4.tar.xz
 mirror://xorg/individual/app/smproxy-1.0.7.tar.xz
 mirror://xorg/individual/app/transset-1.0.3.tar.xz