Log Skyhook connection failures with more info

Closes #2078
Closes #2079

Co-Authored-By: Taloth <Taloth@users.noreply.github.com>

src/NzbDrone.Core/Exceptions/NzbDroneClientException.cs

@@ -1,4 +1,5 @@
-using System.Net;
+using System;
+using System.Net;
 using NzbDrone.Common.Exceptions;
 
 namespace NzbDrone.Core.Exceptions
@@ -13,6 +14,12 @@ namespace NzbDrone.Core.Exceptions
             StatusCode = statusCode;
         }
 
+        public NzbDroneClientException(HttpStatusCode statusCode, string message, Exception innerException, params object[] args)
+            : base(message, innerException, args)
+        {
+            StatusCode = statusCode;
+        }
+
         public NzbDroneClientException(HttpStatusCode statusCode, string message)
             : base(message)
         {

src/NzbDrone.Core/MetadataSource/SkyHook/SkyHookException.cs

@@ -1,4 +1,5 @@
-using System.Net;
+using System;
+using System.Net;
 using NzbDrone.Core.Exceptions;
 
 namespace NzbDrone.Core.MetadataSource.SkyHook
@@ -14,5 +15,10 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
             : base(HttpStatusCode.ServiceUnavailable, message, args)
         {
         }
+
+        public SkyHookException(string message, Exception innerException, params object[] args)
+            : base(HttpStatusCode.ServiceUnavailable, message, innerException, args)
+        {
+        }
     }
 }

src/NzbDrone.Core/MetadataSource/SkyHook/SkyHookProxy.cs

@@ -227,14 +227,20 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
 
                 return httpResponse.Resource.SelectList(MapSearchResult);
             }
-            catch (HttpException)
+            catch (HttpException ex)
             {
-                throw new SkyHookException("Search for '{0}' failed. Unable to communicate with LidarrAPI.", title);
+                _logger.Warn(ex);
+                throw new SkyHookException("Search for '{0}' failed. Unable to communicate with LidarrAPI.", ex, title);
+            }
+            catch (WebException ex)
+            {
+                _logger.Warn(ex);
+                throw new SkyHookException("Search for '{0}' failed. Unable to communicate with SkyHook.", ex, title, ex.Message);
             }
             catch (Exception ex)
             {
                 _logger.Warn(ex, ex.Message);
-                throw new SkyHookException("Search for '{0}' failed. Invalid response received from LidarrAPI.", title);
+                throw new SkyHookException("Search for '{0}' failed. Invalid response received from LidarrAPI.", ex, title);
             }
         }