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/tools/security/pcsclite/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, udev, dbus_libs, perl, python2
+{ stdenv, fetchurl, pkgconfig, udev, dbus, perl, python2
 , IOKit ? null }:
 
 stdenv.mkDerivation rec {
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ pkgconfig perl python2 ];
-  buildInputs = stdenv.lib.optionals stdenv.isLinux [ udev dbus_libs ]
+  buildInputs = stdenv.lib.optionals stdenv.isLinux [ udev dbus ]
              ++ stdenv.lib.optionals stdenv.isDarwin [ IOKit ];
 
   meta = with stdenv.lib; {