Log Goodreads connection failures with more info.

(cherry picked from commit 6672650b6b5e152e82fb3ad38a0a158d66c0b83d)

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/BookInfo/BookInfoException.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Net;
 using NzbDrone.Core.Exceptions;
 
@@ -14,5 +15,10 @@ namespace NzbDrone.Core.MetadataSource.BookInfo
             : base(HttpStatusCode.ServiceUnavailable, message, args)
         {
         }
+
+        public BookInfoException(string message, Exception innerException, params object[] args)
+            : base(HttpStatusCode.ServiceUnavailable, message, innerException, args)
+        {
+        }
     }
 }

src/NzbDrone.Core/MetadataSource/Goodreads/GoodreadsException.cs

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

src/NzbDrone.Core/MetadataSource/GoodreadsSearchProxy/GoodreadsSearchProxy.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Net;
 using NLog;
 using NzbDrone.Common.Http;
 using NzbDrone.Core.Http;
@@ -43,14 +44,20 @@ namespace NzbDrone.Core.MetadataSource.Goodreads
 
                 return response.Resource;
             }
-            catch (HttpException)
+            catch (HttpException ex)
             {
-                throw new GoodreadsException("Search for '{0}' failed. Unable to communicate with Goodreads.", query);
+                _logger.Warn(ex);
+                throw new GoodreadsException("Search for '{0}' failed. Unable to communicate with Goodreads.", ex, query);
+            }
+            catch (WebException ex)
+            {
+                _logger.Warn(ex);
+                throw new GoodreadsException("Search for '{0}' failed. Unable to communicate with Goodreads.", ex, query, ex.Message);
             }
             catch (Exception ex)
             {
-                _logger.Warn(ex, ex.Message);
-                throw new GoodreadsException("Search for '{0}' failed. Invalid response received from Goodreads.", query);
+                _logger.Warn(ex);
+                throw new GoodreadsException("Search for '{0}' failed. Invalid response received from Goodreads.", ex, query);
             }
         }
     }