luaPackages: Replace all rockspec packages with generated ones

luaPackages replaced by generated ones:
- bit32
- compat53
- cqueues
- luacyrussasl -> cyrussasl (luarocks name)
- luaexpat
- luadbi -> luadbi front-end module + separate backend modules
  luadbi-{mysql,postgresql,sqlite3}
- luafilesystem
- luaossl
- luasec
- luasocket
- luastdlib -> stdlib (luarocks name)
- lrexlib -> lrexlib-pcre (we already have lrexlib-gnu and
  lrexlib-posix, lrexlib-pcre however appears to be the variant used in
  mudlet, which is the only current dep in nixpkgs)
- luasqlite -> luasql-sqlite3 (luarocks name)
- lfs -> luafilesytem (we literally had two manually written
  luafilesystem expressions, under different names)

Changes and additions to overrides to generated luarocks packgaes,
including:
- busted: Install bash completions along with the zsh ones
- cqueues:
    - Perform minor surgery on the rockspec to allow using a single
      rockspec to build for all supported Lua versions
    - Add a patch by @vcunat to work around a build issue
- luuid: Wrote a tiny patch to allow for Lua 5.1/Luajit compatibility
- General changes:
    - Sorted the packages
    - Attempted to make the formatting consistent
    - Preferenced `.override` instead of `.overrideAttrs` wherever
      possible

Minor changes to other packages to adjust for the Lua package changes:
- luakit expression simplified
- prosody expression simplified; but users will now need to specify the
  luadbi backend module they intend to use in withExtraLibs
- knot-resolver inputs correctd
- mudlet inputs corrected (although this package was and should still be
  broken)

pkgs/applications/networking/browsers/luakit/default.nix

@@ -1,17 +1,9 @@
 { stdenv, fetchFromGitHub, pkgconfig, wrapGAppsHook
-, help2man, lua5, luafilesystem, luajit, sqlite
+, help2man, luafilesystem, luajit, sqlite
 , webkitgtk, gtk3, gst_all_1, glib-networking
 }:
 
-let
-  lualibs = [luafilesystem];
-  getPath       = lib : type : "${lib}/lib/lua/${lua5.luaversion}/?.${type};${lib}/share/lua/${lua5.luaversion}/?.${type}";
-  getLuaPath    = lib : getPath lib "lua";
-  getLuaCPath   = lib : getPath lib "so";
-  luaPath       = stdenv.lib.concatStringsSep ";" (map getLuaPath lualibs);
-  luaCPath      = stdenv.lib.concatStringsSep ";" (map getLuaCPath lualibs);
-
-in stdenv.mkDerivation rec {
+stdenv.mkDerivation rec {
   pname = "luakit";
   version = "2.1";
 
@@ -27,7 +19,7 @@ in stdenv.mkDerivation rec {
   ];
 
   buildInputs = [
-    webkitgtk lua5 luafilesystem luajit sqlite gtk3
+    webkitgtk luafilesystem luajit sqlite gtk3
     gst_all_1.gstreamer gst_all_1.gst-plugins-base
     gst_all_1.gst-plugins-good gst_all_1.gst-plugins-bad gst_all_1.gst-plugins-ugly
     gst_all_1.gst-libav
@@ -36,8 +28,11 @@ in stdenv.mkDerivation rec {
 
   preBuild = ''
     # build-utils/docgen/gen.lua:2: module 'lib.lousy.util' not found
-    # TODO: why is not this the default?
-    LUA_PATH=?.lua
+    # TODO: why is not this the default? The test runner adds
+    # ';./lib/?.lua;./lib/?/init.lua' to package.path, but the build-utils
+    # scripts don't add an equivalent
+    export LUA_PATH="$NIX_LUA_PATH;./?.lua;./?/init.lua"
+    export LUA_CPATH="$NIX_LUA_CPATH"
   '';
 
   makeFlags = [
@@ -54,8 +49,8 @@ in stdenv.mkDerivation rec {
   in ''
     gappsWrapperArgs+=(
       --prefix XDG_CONFIG_DIRS : "$out/etc/xdg"
-      --set LUA_PATH '${luaKitPath};${luaPath};'
-      --set LUA_CPATH '${luaCPath};'
+      --prefix LUA_PATH ';' "${luaKitPath};$NIX_LUA_PATH"
+      --prefix LUA_CPATH ';' "$NIX_LUA_CPATH"
     )
   '';