saving uncommitted changes in /etc prior to apt run

.etckeeper

@@ -6,7 +6,6 @@ mkdir -p './X11/xkb'
 mkdir -p './apache2/mods-available'
 mkdir -p './apparmor.d/force-complain'
 mkdir -p './apt/auth.conf.d'
-mkdir -p './apt/preferences.d'
 mkdir -p './apt/trusted.gpg.d'
 mkdir -p './avahi/services'
 mkdir -p './binfmt.d'
@@ -272,10 +271,12 @@ maybe chmod 0644 'apt/apt.conf.d/70debconf'
 maybe chmod 0755 'apt/auth.conf.d'
 maybe chmod 0644 'apt/listchanges.conf'
 maybe chmod 0755 'apt/preferences.d'
+maybe chmod 0644 'apt/preferences.d/limit-unstable'
 maybe chmod 0644 'apt/sources.list'
 maybe chmod 0755 'apt/sources.list.d'
 maybe chmod 0644 'apt/sources.list.d/my.list'
 maybe chmod 0644 'apt/sources.list.d/raspi.list'
+maybe chmod 0644 'apt/sources.list.d/unstable.list'
 maybe chmod 0644 'apt/trusted.gpg'
 maybe chmod 0755 'apt/trusted.gpg.d'
 maybe chgrp 'daemon' 'at.deny'