apt: Align entries in main sources.list.

Signed-off-by: Maximilian Wilhelm <max@rfc2324.org>

apt/sources.list.Debian.jessie

@@ -2,16 +2,16 @@
 # /etc/apt/sources.list (Salt managed)
 #
 
-deb http://deb.debian.org/debian/ jessie main non-free contrib
-deb-src http://deb.debian.org/debian/ jessie main non-free contrib
+deb	http://deb.debian.org/debian/ jessie main non-free contrib
+deb-src	http://deb.debian.org/debian/ jessie main non-free contrib
 
-deb http://security.debian.org/ jessie/updates main contrib non-free
-deb-src http://security.debian.org/ jessie/updates main contrib non-free
+deb	http://security.debian.org/ jessie/updates main contrib non-free
+deb-src	http://security.debian.org/ jessie/updates main contrib non-free
 
 # jessie-updates, previously known as 'volatile'
-deb http://deb.debian.org/debian/ jessie-updates main contrib non-free
-deb-src http://deb.debian.org/debian/ jessie-updates main contrib non-free
+deb	http://deb.debian.org/debian/ jessie-updates main contrib non-free
+deb-src	http://deb.debian.org/debian/ jessie-updates main contrib non-free
 
 # Jessie Backports
-deb http://deb.debian.org/debian jessie-backports main contrib non-free
-deb-src http://deb.debian.org/debian jessie-backports main contrib non-free
+deb	http://deb.debian.org/debian jessie-backports main contrib non-free
+deb-src	http://deb.debian.org/debian jessie-backports main contrib non-free

apt/sources.list.Debian.stretch

@@ -2,16 +2,16 @@
 # /etc/apt/sources.list (Salt managed)
 #
 
-deb http://deb.debian.org/debian/ stretch main non-free contrib
-deb-src http://deb.debian.org/debian/ stretch main non-free contrib
+deb	http://deb.debian.org/debian/ stretch main non-free contrib
+deb-src	http://deb.debian.org/debian/ stretch main non-free contrib
 
-deb http://security.debian.org/ stretch/updates main contrib non-free
-deb-src http://security.debian.org/ stretch/updates main contrib non-free
+deb	http://security.debian.org/debian-security stretch/updates main contrib non-free
+deb-src	http://security.debian.org/debian-security stretch/updates main contrib non-free
 
 # stretch-updates, previously known as 'volatile'
-deb http://deb.debian.org/debian/ stretch-updates main contrib non-free
-deb-src http://deb.debian.org/debian/ stretch-updates main contrib non-free
+deb	http://deb.debian.org/debian/ stretch-updates main contrib non-free
+deb-src	http://deb.debian.org/debian/ stretch-updates main contrib non-free
 
 # stretch-backports, previously on backports.debian.org
-deb http://deb.debian.org/debian stretch-backports main contrib non-free
-deb-src http://deb.debian.org/debian stretch-backports main contrib non-free
+deb	http://deb.debian.org/debian/ stretch-backports main contrib non-free
+deb-src	http://deb.debian.org/debian/ stretch-backports main contrib non-free