Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtnetwork/Manifest

@@ -0,0 +1,5 @@
+DIST qtbase-5.15-gentoo-patchset-6.tar.xz 8288 BLAKE2B ad9695a528345dd3b8e9ce72b7bdfe8f744f16685a567bbc7862ba6c28e5a426260cb0b73e2573cb3a6f16f1785786898ffb44c90f5d75354b97e5756c7573db SHA512 97bc4d5375e1750a5578439ff320ee2e5e929df1dafe56b4e86f2de8ad26c91dc4002e45ad75d9f936347d49b9f54c0c42f8fc2cb7dfd4f54bf08a210b3bc720
+DIST qtbase-5.15.18-gentoo-kde-1.tar.xz 450532 BLAKE2B 172732fe6a2f7dd4718b224d8a8ba7b182ded24f74ee38545d20a17364757153b399cae82b40f425e72b2587ec432f024868078edfe95280242211a040ddd9f6 SHA512 e0257171cf723cb6208a06f28fc95fa07d1239ea9dd3daa79d362146aa53e008398c9e1d95443b84d6d71b835a3f010b957e748f3ec23b77a588d6b372fd0c47
+DIST qtbase-everywhere-opensource-src-5.15.18.tar.xz 51492796 BLAKE2B a02f13f2ae8d3994fe5e3fa5b3751cb2981c3203cc4f3859dd4398d6a62101772885acb0c7b1f830ba8e9fbdd64ecfdb2a6074bfedd1bd372b4fc9ceb747467d SHA512 d39c831e6f3ddcd6a50f103ff60a0700b451f137782249508b7447a80066e3e9259c9b5038e6077ccf8df06b6afefec232c3c4dd331d85765089c92571708206
+EBUILD qtnetwork-5.15.18.ebuild 1176 BLAKE2B 802eee24795265f02b13a4b44ebdd83d7abb4d1bb9a5ff9351102678dd47d2bcb0ff16649f1582943d1cdf12db301184eff407cfadbff3f03c4e3ce9276a0392 SHA512 fe26e1ec9724b6db5a14585bef7c38d1eb945a0cdcbaf0188420fc70a544fc34e3b99f6064397b85a831e0ed984f622df2a23fbe45a8b97f51e10fcc612956cf
+MISC metadata.xml 690 BLAKE2B 3e1cccd88cb778d868aa5aa650d9114a79eaf7b5961dc6222b2da3e5c7536a43c7481b6d56bb9176b36ed2560ccb0712635146872f370fdc1e319286133a1651 SHA512 e402ad3b586e305a6f7ee99f24edd505b1e76f7a957108fc252a4a1af8978ac113b9b1c56e4fb0bfb696bcf29a1295f52af6614924f0e3ae2d7f71810a3be707

dev-qt/qtnetwork/metadata.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>qt@gentoo.org</email>
+		<name>Gentoo Qt Project</name>
+	</maintainer>
+	<use>
+		<flag name="gssapi">Enable support for GSSAPI (<pkg>virtual/krb5</pkg>)</flag>
+		<flag name="libproxy">Use <pkg>net-libs/libproxy</pkg> for automatic
+			HTTP/SOCKS proxy configuration</flag>
+	</use>
+	<upstream>
+		<bugs-to>https://bugreports.qt.io/</bugs-to>
+		<doc>https://doc.qt.io/</doc>
+	</upstream>
+	<slots>
+		<subslots>
+			Must only be used by packages that are known to use private parts of the Qt API.
+		</subslots>
+	</slots>
+</pkgmetadata>

dev-qt/qtnetwork/qtnetwork-5.15.18.ebuild

@@ -0,0 +1,62 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv x86"
+fi
+
+QT5_MODULE="qtbase"
+inherit qt5-build
+
+DESCRIPTION="Network abstraction library for the Qt5 framework"
+
+IUSE="gssapi libproxy sctp +ssl"
+
+DEPEND="
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	virtual/zlib:=
+	gssapi? ( virtual/krb5 )
+	libproxy? ( net-libs/libproxy )
+	sctp? ( kernel_linux? ( net-misc/lksctp-tools ) )
+	ssl? ( >=dev-libs/openssl-1.1.1:0= )
+"
+RDEPEND="${DEPEND}"
+
+QT5_TARGET_SUBDIRS=(
+	src/network
+	src/plugins/bearer/generic
+)
+
+QT5_GENTOO_CONFIG=(
+	libproxy:libproxy:
+	ssl::SSL
+	ssl::OPENSSL
+	ssl:openssl-linked:LINKED_OPENSSL
+)
+
+QT5_GENTOO_PRIVATE_CONFIG=(
+	:network
+)
+
+src_configure() {
+	local myconf=(
+		$(qt_use gssapi feature-gssapi)
+		$(qt_use libproxy)
+		$(qt_use sctp)
+		$(usev ssl -openssl-linked)
+	)
+	qt5-build_src_configure
+}
+
+src_install() {
+	qt5-build_src_install
+
+	# workaround for bug 652650
+	if use ssl; then
+		sed -e "/^#define QT_LINKED_OPENSSL/s/$/ true/" \
+			-i "${D}${QT5_HEADERDIR}"/Gentoo/${PN}-qconfig.h || die
+	fi
+}