New: Genre parameter for Music search

src/NzbDrone.Core/IndexerSearch/Definitions/MusicSearchCriteria.cs

@@ -7,6 +7,8 @@ namespace NzbDrone.Core.IndexerSearch.Definitions
         public string Album { get; set; }
         public string Artist { get; set; }
         public string Label { get; set; }
+        public string Genre { get; set; }
+        public int? Year { get; set; }
 
         public override bool RssSearch
         {

src/NzbDrone.Core/IndexerSearch/ReleaseSearchService.cs

@@ -72,6 +72,8 @@ namespace NzbDrone.Core.IndexerSearch
             searchSpec.Artist = request.artist;
             searchSpec.Album = request.album;
             searchSpec.Label = request.label;
+            searchSpec.Genre = request.genre;
+            searchSpec.Year = request.year;
 
             return new NewznabResults { Releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec) };
         }

src/NzbDrone.Core/Indexers/IndexerCapabilities.cs

@@ -35,7 +35,8 @@ namespace NzbDrone.Core.Indexers
         Album,
         Artist,
         Label,
-        Year
+        Year,
+        Genre
     }
 
     public enum SearchParam
@@ -84,6 +85,7 @@ namespace NzbDrone.Core.Indexers
         public bool MusicSearchArtistAvailable => MusicSearchParams.Contains(MusicSearchParam.Artist);
         public bool MusicSearchLabelAvailable => MusicSearchParams.Contains(MusicSearchParam.Label);
         public bool MusicSearchYearAvailable => MusicSearchParams.Contains(MusicSearchParam.Year);
+        public bool MusicSearchGenreAvailable => MusicSearchParams.Contains(MusicSearchParam.Genre);
 
         public List<BookSearchParam> BookSearchParams;
         public bool BookSearchAvailable => BookSearchParams.Count > 0;
@@ -359,6 +361,11 @@ namespace NzbDrone.Core.Indexers
                 parameters.Add("year");
             }
 
+            if (MusicSearchGenreAvailable)
+            {
+                parameters.Add("genre");
+            }
+
             return string.Join(",", parameters);
         }