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/filesystems/vmfs-tools/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, pkgconfig
-, asciidoc, docbook_xml_xslt, fuse, libuuid, libxslt }:
+, asciidoc, docbook_xsl, fuse, libuuid, libxslt }:
 
 stdenv.mkDerivation rec {
   name = "vmfs-tools";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "14y412ww5hxk336ils62s3fwykfh6mx1j0iiaa5cwc615pi6qvi4";
   };
 
-  nativeBuildInputs = [ asciidoc docbook_xml_xslt fuse libuuid libxslt pkgconfig ];
+  nativeBuildInputs = [ asciidoc docbook_xsl fuse libuuid libxslt pkgconfig ];
 
   enableParallelBuilding = true;