Merge branch 'master' into staging

* master: (271 commits)
  pysmbc: clarify license
  pysmbc: fix license
  bazel: 0.5.4 -> 0.6.0 (#29990)
  googler: init at 3.3
  go: declare support for aarch64
  firefox-beta-bin: 56.0b5 -> 57.0b4
  spotify: 1.0.64.401.g9d720389-21 -> 1.0.64.407.g9bd02c2d-26
  gogs: 0.11.19 -> 0.11.29
  grafana: 4.5.1 -> 4.5.2
  mopidy-iris: 3.4.1 -> 3.4.9
  nextcloud: 12.0.2 -> 12.0.3
  haskell-json-autotype: jailbreak to fix build within LTS 9.x
  kore: fix up
  kore: init at 2.0.0
  glusterfs service: fix issues with useRpcbind
  tig: 2.2.2 -> 2.3.0
  haskell-hspec-core: enable test suite again
  hackage-packages.nix: automatic Haskell package set update
  librsvg: fix thumbnailer path
  awscli: 1.11.108 -> 1.11.162
  ...

pkgs/servers/sql/postgresql/timescaledb/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, fetchFromGitHub, postgresql }:
+
+# # To enable on NixOS:
+# config.services.postgresql = {
+#   extraPlugins = [ pkgs.timescaledb ];
+#   extraConfig = "shared_preload_libraries = 'timescaledb'";
+# }
+
+stdenv.mkDerivation rec {
+  name = "timescaledb-${version}";
+  version = "0.5.0";
+
+  buildInputs = [ postgresql ];
+
+  src = fetchFromGitHub {
+    owner = "timescale";
+    repo = "timescaledb";
+    rev = version;
+    sha256 = "01swgjw563c42azxsg55ry7cyiipxkcvfrxmw71jil5dxl3s0fkz";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin
+    install -D timescaledb.so      -t $out/lib
+    install -D timescaledb.control -t $out/share/extension
+    cp -dpR    sql/*                  $out/share/extension/
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Scales PostgreSQL for time-series data via automatic partitioning across time and space";
+    homepage = https://www.timescale.com/;
+    maintainers = with maintainers; [ volth ];
+    platforms = platforms.linux;
+    license = licenses.postgresql;
+  };
+}