rust: depend on curl+nghttp2 (#36947)

var/spack/repos/builtin/packages/rust/package.py

@@ -60,6 +60,9 @@ class Rust(Package):
     depends_on("pkgconfig", type="build")
     # TODO: openssl@3.x should be supported in later versions
     depends_on("openssl@:1")
+    # Cargo itself needs libcurl with nghttp2. If not found with pkg-config
+    # it will build vendored versions of libcurl, nghttp2, and openssl.
+    depends_on("curl+nghttp2")
     depends_on("libssh2")
     # https://github.com/rust-lang/cargo/issues/10446
     depends_on("libgit2@:1.3", when="@0:1.60")