docs: Clarify our stance on backported packages

The repositories containing them are usually offered with lower
guarantees, so we don't consider them when it comes to figuring
out the minimum targeted version of our dependencies.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/docs/platforms.rst b/docs/platforms.rst
index 8c281afebd7a8bcb71c0ed6ece2d3403275ba78e..90f14b02e8d641c3f3df788cc852b3002148a763 100644 (file)
--- a/docs/platforms.rst
+++ b/docs/platforms.rst
@@ -42,8 +42,10 @@ The project aims to support the most recent major version at all times. Support
 for the previous major version will be dropped 2 years after the new major
 version is released or when the vendor itself drops support, whichever comes
 first. In this context, third-party efforts to extend the lifetime of a distro
-are not considered, even when they are endorsed by the vendor (eg. Debian LTS).
-Within each major release, only the most recent minor release is considered.
+are not considered, even when they are endorsed by the vendor (e.g. Debian
+LTS); the same is true of repositories that contain packages backported from
+later releases (e.g. Debian backports). Within each major release, only the
+most recent minor release is considered.
 
 For the purposes of identifying supported software versions available on Linux,
 the project will look at CentOS, Debian, Fedora, openSUSE, RHEL, SLES and