Clear problems if manually trusted.

Fixes CLIENT-271

Change-Id: I7cc4e8aada6f6d5c6ad4c344f7e7ca91276750a2
Reviewed-on: http://gerrit.dmdirc.com/2108
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

src/com/dmdirc/tls/CertificateManager.java

@@ -373,6 +373,9 @@ public class CertificateManager implements X509TrustManager {
                     break;
             }
         }
+        if (manual) {
+            problems.clear();
+        }
     }
 
     /**