New: Parse names with 4k as 2160p

Closes #2788

src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs

@@ -135,6 +135,13 @@ namespace NzbDrone.Core.Test.ParserTests
             ParseAndVerifyQuality(title, Quality.HDTV1080p, proper);
         }
 
+        [TestCase("My Title - S01E01 - EpTitle [HEVC 4k DTSHD-MA-6ch]", false)]
+        [TestCase("My Title - S01E01 - EpTitle [HEVC-4k DTSHD-MA-6ch]", false)]
+        public void should_parse_hdtv2160p_quality(string title, bool proper)
+        {
+            ParseAndVerifyQuality(title, Quality.HDTV2160p, proper);
+        }
+
         [TestCase("Arrested.Development.S04E01.720p.WEBRip.AAC2.0.x264-NFRiP", false)]
         [TestCase("Vanguard S01E04 Mexicos Death Train 720p WEB DL", false)]
         [TestCase("Hawaii Five 0 S02E21 720p WEB DL DD5 1 H 264", false)]

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -40,7 +40,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex RealRegex = new Regex(@"\b(?<real>REAL)\b",
                                                                 RegexOptions.Compiled);
 
-        private static readonly Regex ResolutionRegex = new Regex(@"\b(?:(?<R480p>480p|640x480|848x480)|(?<R576p>576p)|(?<R720p>720p|1280x720)|(?<R1080p>1080p|1920x1080|1440p)|(?<R2160p>2160p|4k[-_. ]UHD|UHD[-_. ]4k))\b",
+        private static readonly Regex ResolutionRegex = new Regex(@"\b(?:(?<R480p>480p|640x480|848x480)|(?<R576p>576p)|(?<R720p>720p|1280x720)|(?<R1080p>1080p|1920x1080|1440p)|(?<R2160p>2160p|4k[-_. ]UHD|UHD[-_. ]4k|[-_. ]4k))\b",
                                                                 RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex CodecRegex = new Regex(@"\b(?:(?<x264>x264)|(?<h264>h264)|(?<xvidhd>XvidHD)|(?<xvid>Xvid)|(?<divx>divx))\b",