reorder the FAQ to make our recommendations a bit more obvious

Author: jstrachan

FAQ.md

@@ -19,10 +19,12 @@ A typical fabric8 installation has a ZooKeeper ensemble (a number of ZooKeeper s
 
 If there are only exactly 2 data centres and either is allowed to fail and the other takes over; then there's no real way to solve this the single-ZooKeeper ensemble route automatically; since there's no way to achieve quorum in either data centre. (Its trivial to have, say, 2 ZK servers in one DC X and 1 in the DC Y; but then if DC X fails; you can't achieve quorum automatically.
 
-There’s a few ways this could work; it depends on trade-offs really. Here's a few options
-
-* pick one DC as the master and run more ZK servers there. If that DC fails, you have to manually decide its down (and make sure the ZK servers are manually taken down) then run some more in the remaining DC. i.e. a manual failover process if the master fails (though automatic if the slave fails).
+There’s a few ways this could work; it depends on trade-offs really. Our recommended approach is:
 
 * run 2 ZK ensembles in each DC. This then means things work fine; either DC can fail at any time. It does mean that you cannot have one global master service any more; you can only have DC-local masters (e.g. a master broker in each DC). Then you store/forward between the DCs. There's a [pending issue](https://github.com/fabric8io/fabric8/issues/622) to try make a 2-data centre and 2-fabric deployment appear more like a single logical fabric (by having a form of store/foward bridging at the ZK level).
 
+If you want to favour one DC so that its the master and have some manual recovery mechanism you could consider this approach (though its not really recommended):
+
+* pick one DC as the master and run more ZK servers there. If that DC fails, you have to manually decide its down (and make sure the ZK servers are manually taken down) then run some more in the remaining DC. i.e. a manual failover process if the master fails (though automatic if the slave fails).
+