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/cryptsetup/default.nix

@@ -1,4 +1,5 @@
-{ stdenv, fetchurl, fetchpatch, devicemapper, json_c, openssl, libuuid, pkgconfig, popt
+{ stdenv, fetchurl, fetchpatch, lvm2, json_c
+, openssl, libuuid, pkgconfig, popt
 , enablePython ? false, python2 ? null }:
 
 assert enablePython -> python2 != null;
@@ -28,7 +29,7 @@ stdenv.mkDerivation rec {
   ] ++ stdenv.lib.optional enablePython "--enable-python";
 
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ devicemapper json_c openssl libuuid popt ]
+  buildInputs = [ lvm2 json_c openssl libuuid popt ]
     ++ stdenv.lib.optional enablePython python2;
 
   meta = {