bitcoin: Remove libsodium transistive dependency from bitcoin

The official binaries for bitcoin-core explicitly configure their dependencies to minimize them.
In this commit we bring the zeromq dependency closer to

    https://github.com/bitcoin/bitcoin/blob/94ddc2dced5736612e358a3b80f2bc718fbd8161/depends/packages/zeromq.mk

In particular, libsodium is no longer a runtime dependency of bitcoin.

pkgs/by-name/ze/zeromq/package.nix

@@ -4,11 +4,13 @@
   fetchFromGitHub,
   cmake,
   pkg-config,
-  libsodium,
+  libsodium ? null,
   asciidoc,
   xmlto,
+  enableCurve ? true,
   enableDrafts ? false,
   fetchpatch,
+  withLibsodium ? libsodium != null,
   # for passthru.tests
   azmq,
   cppzmq,
@@ -61,13 +63,13 @@ stdenv.mkDerivation (finalAttrs: {
     xmlto
   ];
 
-  buildInputs = [ libsodium ];
+  buildInputs = lib.optionals withLibsodium [ libsodium ];
 
   cmakeFlags = [
     (lib.cmakeBool "BUILD_SHARED" (!stdenv.hostPlatform.isStatic))
-    (lib.cmakeBool "ENABLE_CURVE" true)
+    (lib.cmakeBool "ENABLE_CURVE" enableCurve)
     (lib.cmakeBool "ENABLE_DRAFTS" enableDrafts)
-    (lib.cmakeBool "WITH_LIBSODIUM" true)
+    (lib.cmakeBool "WITH_LIBSODIUM" withLibsodium)
   ];
 
   postPatch = ''

pkgs/top-level/all-packages.nix

@@ -12546,12 +12546,16 @@ with pkgs;
 
   bitcoin = qt6Packages.callPackage ../applications/blockchains/bitcoin {
     withGui = true;
+    zeromq = zeromq.override {
+      enableCurve = false;
+      enableDrafts = false;
+      libsodium = null;
+    };
     inherit (darwin) autoSignDarwinBinariesHook;
   };
 
-  bitcoind = callPackage ../applications/blockchains/bitcoin {
+  bitcoind = bitcoin.override {
     withGui = false;
-    inherit (darwin) autoSignDarwinBinariesHook;
   };
 
   bitcoin-knots = libsForQt5.callPackage ../applications/blockchains/bitcoin-knots {