[geary/wip/789924-network-transition: 10/15] Misc ClientSessionManager fixes.

[Michael Gratton <mjog src gnome org>]

commit acb339f2abf739b92972babe372f101e28bc6ea2
Author: Michael James Gratton <mike vee net>
Date:   Fri Nov 10 00:26:35 2017 +1100

    Misc ClientSessionManager fixes.

 .../transport/imap-client-session-manager.vala     |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/src/engine/imap/transport/imap-client-session-manager.vala 
b/src/engine/imap/transport/imap-client-session-manager.vala
index 02f84a4..f75647f 100644
--- a/src/engine/imap/transport/imap-client-session-manager.vala
+++ b/src/engine/imap/transport/imap-client-session-manager.vala
@@ -134,6 +134,9 @@ public class Geary.Imap.ClientSessionManager : BaseObject {
         this.is_open = false;
         this.is_ready = false;
 
+        this.pool_start.reset();
+        this.pool_retry.reset();
+
                this.endpoint.connectivity.notify["is-reachable"].disconnect(on_connectivity_change);
 
         // to avoid locking down the sessions table while scheduling disconnects, make a copy
@@ -225,10 +228,10 @@ public class Geary.Imap.ClientSessionManager : BaseObject {
     private async ClientSession create_new_authorized_session(Cancellable? cancellable) throws Error {
         if (authentication_failed)
             throw new ImapError.UNAUTHENTICATED("Invalid ClientSessionManager credentials");
-        
+
         if (untrusted_host)
-            throw new ImapError.UNAUTHENTICATED("Untrusted host %s", endpoint.to_string());
-        
+            throw new ImapError.UNAVAILABLE("Untrusted host %s", endpoint.to_string());
+
         if (!this.endpoint.connectivity.is_reachable)
             throw new ImapError.UNAVAILABLE("Host at %s is unreachable", endpoint.to_string());