lprint: Add enableExperimental parameter

pkgs/by-name/lp/lprint/package.nix

@@ -5,6 +5,8 @@
   pappl,
   cups,
   pkg-config,
+  # Enables support for untested printers. It makes sense to default this to true, as it's unlikely to result in any issues
+  enableExperimental ? true,
 }:
 
 stdenv.mkDerivation rec {
@@ -32,6 +34,8 @@ stdenv.mkDerivation rec {
     cups
   ];
 
+  configureFlags = lib.optional enableExperimental "--enable-experimental";
+
   doInstallCheck = true;
   installCheckPhase = ''
     $out/bin/lprint --help