[snapshot/master] Adjust the wording of the Valid-Until warning (Closes: #784082)

[Paul Wise <pabs@debian.org>]

---
 web/app/snapshot/templates/description.mako |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/web/app/snapshot/templates/description.mako b/web/app/snapshot/templates/description.mako
index 2f4a6de..db3495a 100644
--- a/web/app/snapshot/templates/description.mako
+++ b/web/app/snapshot/templates/description.mako
@@ -67,7 +67,8 @@ is no import at the exact time you specified you will get the latest
 available timestamp which is before the time you specified.
 </p>
 <p>
-It may be necessary to ignore the Valid-Until header within Release files, in order
+To access snapshots of suites using Valid-Until that are older than a dozen days,
+it is necessary to ignore the Valid-Until header within Release files, in order
 to prevent apt from disregarding snapshot entries ("Release file expired").  Use
 <code>aptitude -o Acquire::Check-Valid-Until=false update</code> or
 <code>apt-get -o Acquire::Check-Valid-Until=false update</code> for this purpose.
-- 
1.7.10.4