hosts: enable the transition from Refine to Move

We need to be able to move hosts after refining them, whether that's to
send them to the greylist or to the whitelist.

src/net/hosts.rs

@@ -226,7 +226,7 @@ impl HostState {
         let end = HostState::Move.to_string();
         match self {
             HostState::Insert => Err(Error::HostStateBlocked(start, end)),
-            HostState::Refine => Err(Error::HostStateBlocked(start, end)),
+            HostState::Refine => Ok(HostState::Move),
             HostState::Connect => Ok(HostState::Move),
             HostState::Suspend => Err(Error::HostStateBlocked(start, end)),
             HostState::Connected(_) => Ok(HostState::Move),