net-libs/libcurl-debian: New symlink package for Debian compatibility

This isn't going in the main tree, at least for now, as I'm a little
unsure about whether symlinking to different backends would ever
break. It doesn't appear to in most cases.

This doesn't deal with the fact that Debian also packages libcurl.so.3
and friends. Hopefully we won't need that.

Package-Manager: portage-2.3.0

net-libs/libcurl-debian/libcurl-debian-4.ebuild

@@ -0,0 +1,25 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit multilib multilib-minimal
+
+DESCRIPTION="libcurl-{gnutls,nss}.so.${SLOT} symlinks for compatibility with Debian"
+HOMEPAGE="https://curl.haxx.se/"
+LICENSE="MIT"
+SLOT="4"
+KEYWORDS="~amd64 ~x86"
+
+RDEPEND=">=net-misc/curl-7.16.0[${MULTILIB_USEDEP}]"
+
+S="${WORKDIR}"
+
+multilib_src_install() {
+	local backend
+
+	for backend in gnutls nss; do
+		dosym ../libcurl.so.${SLOT} /usr/$(get_libdir)/debiancompat/libcurl-${backend}.so.${SLOT}
+	done
+}

net-libs/libcurl-debian/metadata.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>chewi@gentoo.org</email>
+		<name>James Le Cuirot</name>
+	</maintainer>
+	<longdescription>
+	  Unlike Gentoo, Debian allows multiple copies of libcurl built
+	  against different backends to be installed simultaneously. For
+	  reasons best known to themselves, some developers release
+	  binaries linked against libcurl-gnutls.so instead of libcurl.so,
+	  the latter being the OpenSSL variant. Although it is less than
+	  ideal, real world usage has shown that symlinking from one to
+	  the other doesn't cause any issues so this package provides such
+	  a symlink to satisfy prebuilt binaries. Usage of libcurl-nss.so
+	  seems less common but a symlink for that has also been included
+	  for completeness.
+	</longdescription>
+</pkgmetadata>