treewide: remove aliases in nixpkgs

This makes the command ‘nix-env -qa -f. --arg config '{skipAliases =
true;}'’ work in Nixpkgs.

Misc...

- qtikz: use libsForQt5.callPackage

  This ensures we get the right poppler.

- rewrites:

  docbook5_xsl -> docbook_xsl_ns
  docbook_xml_xslt -> docbook_xsl

diffpdf: fixup

pkgs/development/libraries/pipewire/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, meson, ninja, pkgconfig, doxygen, graphviz, valgrind
-, glib, dbus, gst_all_1, v4l_utils, alsaLib, ffmpeg, libjack2, libudev, libva, xorg
+, glib, dbus, gst_all_1, v4l_utils, alsaLib, ffmpeg, libjack2, udev, libva, xorg
 , sbc, SDL2, makeFontsConf, freefont_ttf
 }:
 
@@ -26,7 +26,7 @@ in stdenv.mkDerivation rec {
   ];
   buildInputs = [
     glib dbus gst_all_1.gst-plugins-base gst_all_1.gstreamer v4l_utils
-    alsaLib ffmpeg libjack2 libudev libva xorg.libX11 sbc SDL2
+    alsaLib ffmpeg libjack2 udev libva xorg.libX11 sbc SDL2
   ];
 
   mesonFlags = [