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/os-specific/linux/dmraid/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, devicemapper }:
+{ stdenv, fetchurl, fetchpatch, lvm2 }:
 
 stdenv.mkDerivation rec {
   name = "dmraid-1.0.0.rc16";
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   preConfigure = "cd */";
 
-  buildInputs = [ devicemapper ];
+  buildInputs = [ lvm2 ];
 
   meta = {
     description = "Old-style RAID configuration utility";