rspamd: add option to use hyperscan or vectorscan (#443372)

pkgs/by-name/rs/rspamd/package.nix

@@ -15,6 +15,7 @@
   ragel,
   fasttext,
   icu,
+  hyperscan,
   vectorscan,
   jemalloc,
   blas,
@@ -27,10 +28,15 @@
   # Enabling blas support breaks bayes filter training from dovecot in nixos-mailserver tests
   # https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/issues/321
   withBlas ? false,
+  withHyperscan ? false,
   withLuaJIT ? stdenv.hostPlatform.isx86_64,
+  withVectorscan ? true,
   nixosTests,
 }:
 
+assert withHyperscan -> stdenv.hostPlatform.isx86_64;
+assert (!withHyperscan) || (!withVectorscan);
+
 stdenv.mkDerivation rec {
   pname = "rspamd";
   version = "3.12.1";
@@ -66,14 +72,15 @@ stdenv.mkDerivation rec {
     xxHash
     zstd
     libarchive
-    vectorscan
   ]
   ++ lib.optionals withBlas [
     blas
     lapack
   ]
+  ++ lib.optional withHyperscan hyperscan
   ++ lib.optional withLuaJIT luajit
-  ++ lib.optional (!withLuaJIT) lua;
+  ++ lib.optional (!withLuaJIT) lua
+  ++ lib.optional withVectorscan vectorscan;
 
   cmakeFlags = [
     # pcre2 jit seems to cause crashes: https://github.com/NixOS/nixpkgs/pull/181908