Refactor and cleanup defaults

- 49-network is now using versioning
- 50-dropbear will make sure dropbear runs even if no version bump
  happened

defaults/49-network

@@ -1,7 +1,9 @@
-[ "$(uci -q get luci.diag.dns)" = "bitmessage.org" ] && exit 0
+VERSION=1
 
-# make a significant change
-/sbin/uci set luci.diag.dns='bitmessage.org'
+[ "$(uci -q get defaults.version.network)" -ge "$VERSION" ] & exit 
+
+# save version
+/sbin/uci set defaults.version.network="$VERSION"
 
 # switch LAN to eth1
 /sbin/uci set network.@device[0].ports='eth1'

defaults/50-dropbear

@@ -1,6 +1,12 @@
 VERSION=1
 
-[ "$(uci -q get defaults.version.dropbear)" -ge "$VERSION" ] && exit 0
+if [ "$(uci -q get defaults.version.dropbear)" -ge "$VERSION" ]
+then
+	# may leave dropbear off after an upgrade
+	/sbin/service dropbear enable
+	/sbin/service dropbear restart
+	exit 0
+fi
 
 # save version
 /sbin/uci set defaults.version.dropbear="$VERSION"