99porterbox-extra-sources: Update security blacklist post-stretch

Now that stretch has been released, we want to include the security archive.
Moreover, buster (the current testing) is present in the security archive, so
we can avoid the need to update this blacklist after every release.

diff --git a/modules/schroot/files/schroot-setup.d/99porterbox-extra-sources b/modules/schroot/files/schroot-setup.d/99porterbox-extra-sources
index e6e0f08..c973d14 100755 (executable)
--- a/modules/schroot/files/schroot-setup.d/99porterbox-extra-sources
+++ b/modules/schroot/files/schroot-setup.d/99porterbox-extra-sources
@@ -73,7 +73,7 @@ if [ "$1" = "setup-start" ] || [ "$1" = "setup-recover" ]; then
           echo "deb     $debugmirror sid-debug main" >> "$SRCL"
           echo "deb-src $debugmirror sid-debug main" >> "$SRCL"
           ;;
-        sid|stretch)
+        sid)
           ;;
         *)
           echo "deb     http://security.debian.org/ ${suite_alias}/updates main" >> "$SRCL"