slight improvements to ganeti setup procedure

tsa/howto/ganeti.mdwn

@@ -622,7 +622,7 @@ catastrophic data loss bug in Ganeti or [[drbd]].
 
 - Network setup:
 
-  1. Add the server to the two `vSwitch` systems in Hetzner Robot
+  1. Add the server to the two `vSwitch` systems in [Hetzner Robot web UI](https://robot.your-server.de/vswitch)
 
   2. install openvswitch and allow modules to be loaded
 
@@ -630,14 +630,15 @@ catastrophic data loss bug in Ganeti or [[drbd]].
          reboot
          apt install openvswitch-switch
 
-  3. Allocate a private IP address in the 30.172.in-addr.arpa zone for
+  3. Allocate a private IP address in the `30.172.in-addr.arpa` zone for
      the node.
 
   4. copy over the `/etc/network/interfaces` from another ganeti node,
      changing the `address` and `gateway` fields to match the local
      entry.
 
-  5. knock on wood, cross your fingers, or whatever, and reboot:
+  5. knock on wood, cross your fingers, pet a cat, help your local
+     book store, and reboot:
   
          reboot