Meta: Patch nghttp2 to ignore DATA frames after a stream is half-closed

Otherwise, stopping downloads repeatedly will result in the reused
connection to the server being closed by nghttp2 with a GOAWAY frame
with a code of 0xB (ENHANCE_YOUR_CALM).

For more information: https://github.com/nghttp2/nghttp2/issues/2597

Meta/CMake/vcpkg/overlay-ports/nghttp2/allow-data-after-half-closed.patch

@@ -0,0 +1,20 @@
+diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
+index 518296e777..680cc1805c 100644
+--- a/lib/nghttp2_session.c
++++ b/lib/nghttp2_session.c
+@@ -5489,15 +5489,6 @@ nghttp2_ssize nghttp2_session_mem_recv2(nghttp2_session *session,
+           DEBUGF("recv: DATA not allowed stream_id=%d\n",
+                  iframe->frame.hd.stream_id);
+ 
+-          rv = session_update_glitch_ratelim(session);
+-          if (rv != 0) {
+-            return rv;
+-          }
+-
+-          if (iframe->state == NGHTTP2_IB_IGN_ALL) {
+-            return (nghttp2_ssize)inlen;
+-          }
+-
+           iframe->state = NGHTTP2_IB_IGN_DATA;
+           break;
+         }

Meta/CMake/vcpkg/overlay-ports/nghttp2/portfile.cmake

@@ -0,0 +1,56 @@
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO nghttp2/nghttp2
+    REF "v${VERSION}"
+    SHA512 95af9926dfd2454dff52ea4ba2b6708548a9add0f48e14d3d843982609168d79dabf2958076e5761fac6d00c5b1f4d0fe5d9d1694c1e07c92a4ce3cdf0023ef6
+    HEAD_REF master
+    PATCHES
+        allow-data-after-half-closed.patch
+)
+
+string(COMPARE EQUAL "${VCPKG_CRT_LINKAGE}" "static" ENABLE_STATIC_CRT)
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" ENABLE_STATIC_LIB)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        -DENABLE_LIB_ONLY=ON
+        -DENABLE_DOC=OFF
+        -DBUILD_TESTING=OFF
+        "-DENABLE_STATIC_CRT=${ENABLE_STATIC_CRT}"
+        "-DBUILD_STATIC_LIBS=${ENABLE_STATIC_LIB}"
+        -DCMAKE_DISABLE_FIND_PACKAGE_Python3=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_OpenSSL=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Libngtcp2=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Libngtcp2_crypto_quictls=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Libnghttp3=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Systemd=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Jansson=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Libevent=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_LibXml2=ON
+        -DCMAKE_DISABLE_FIND_PACKAGE_Jemalloc=ON
+    MAYBE_UNUSED_VARIABLES
+        CMAKE_DISABLE_FIND_PACKAGE_Libngtcp2_crypto_quictls
+        ENABLE_STATIC_CRT
+)
+vcpkg_cmake_install()
+vcpkg_copy_pdbs()
+vcpkg_fixup_pkgconfig()
+
+file(REMOVE_RECURSE
+    "${CURRENT_PACKAGES_DIR}/debug/include"
+    "${CURRENT_PACKAGES_DIR}/debug/share"
+    "${CURRENT_PACKAGES_DIR}/share/doc"
+    "${CURRENT_PACKAGES_DIR}/debug/lib/cmake"
+    "${CURRENT_PACKAGES_DIR}/lib/cmake"
+)
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL static)
+    file(APPEND "${CURRENT_PACKAGES_DIR}/include/nghttp2/nghttp2ver.h" [[
+#ifndef NGHTTP2_STATICLIB
+#  define NGHTTP2_STATICLIB
+#endif
+]])
+endif()
+
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/COPYING")

Meta/CMake/vcpkg/overlay-ports/nghttp2/vcpkg.json

@@ -0,0 +1,14 @@
+{
+  "name": "nghttp2",
+  "version": "1.68.0",
+  "port-version": 1,
+  "description": "Implementation of the Hypertext Transfer Protocol version 2 in C",
+  "homepage": "https://github.com/nghttp2/nghttp2",
+  "license": "MIT",
+  "dependencies": [
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    }
+  ]
+}

Meta/check-flatpak.py

@@ -40,6 +40,7 @@ flatpak_runtime_libs = [
     "harfbuzz",
     "libjpeg-turbo",
     "libproxy",
+    "nghttp2",  # FIXME: This can be removed when the vcpkg overlay is no longer needed.
     "qtbase",
     "qtmultimedia",
     "sqlite3",

vcpkg.json

@@ -300,6 +300,10 @@
       "name": "mman",
       "version": "git-f5ff813#5"
     },
+    {
+      "name": "nghttp2",
+      "version": "1.68.0#1"
+    },
     {
       "name": "openssl",
       "version": "3.5.3#0"