app-crypt/certbot-dns-rfc2136: provide transition package

The new merged app-crypt/certbot has blockers on all the old split
modules like certbot-nginx, which leads to poor UX when users who have
e.g. certbot-nginx in their world file now to try to upgrade.

Add a dummy set of ebuilds for the old split modules to depend on the
merged certbot with the right USE, which we can last-rite in a while.

Signed-off-by: Thibaud CANALE <thican@thican.net>

app-crypt/certbot-dns-rfc2136/certbot-dns-rfc2136-3.2.0-r100.ebuild

@@ -0,0 +1,30 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DESCRIPTION="RFC 2136 DNS Authenticator plugin for Certbot (Let’s Encrypt Client)"
+HOMEPAGE="
+	https://github.com/certbot/certbot
+	https://pypi.org/project/certbot-dns-rfc2136/
+	https://certbot-dns-rfc2136.readthedocs.io/en/stable/
+	https://letsencrypt.org/
+"
+
+LICENSE="metapackage"
+SLOT="0"
+
+KEYWORDS="~amd64 ~arm64 ~riscv"
+
+# Meta package for transition
+# No need to upgrade thanks to ">="
+RDEPEND="
+	>=app-crypt/certbot-${PV}-r100[certbot-dns-rfc2136]
+"
+
+pkg_postinst() {
+	elog "This is a meta-package to help in transition to single package "
+	elog "app-crypt/certbot."
+	elog "It is advice to simply deselect this package and to emerge "
+	elog "app-crypt/certbot[certbot-dns-rfc2136] for this module."
+}