Fixed: Parse Multi Disk DVDs & MDVDR (#8639)

* Update QualityParser.cs

Added: Support for Multi Disk DVD releases
Added: Support for MDVDR

* Update QualityParserFixture.cs

Added: Support for Multi Disk DVD releases
Added: Support for MDVDR

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

@@ -86,6 +86,9 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Some.Movie.Magic.Rainbow.2007.DVD9.NTSC", false)]
         [TestCase("Some.Movie.Magic.Rainbow.2007.DVDR.NTSC", false)]
         [TestCase("Some.Movie.Magic.Rainbow.2007.DVD-R.NTSC", false)]
+        [TestCase("Some.Movie.2020.PAL.2xDVD9", false)]
+        [TestCase("Some.Movie.2000.2DVD5", false)]
+        [TestCase("Some.Movie.2005.PAL.MDVDR-SOMegRoUP", false)]
         public void should_parse_dvdr_quality(string title, bool proper)
         {
             ParseAndVerifyQuality(title, Source.DVD, proper, Resolution.R480p, Modifier.REMUX);

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -21,7 +21,7 @@ namespace NzbDrone.Core.Parser
                                                             (?<hdtv>HDTV)|
                                                             (?<bdrip>BDRip|BDLight)|
                                                             (?<brrip>BRRip)|
-                                                            (?<dvdr>DVD-R|DVDR|DVD5|DVD9)|
+                                                            (?<dvdr>\d?x?M?DVD-?[R59])|
                                                             (?<dvd>DVD(?!-R)|DVDRip|xvidvd)|
                                                             (?<dsr>WS[-_. ]DSR|DSR)|
                                                             (?<regional>R[0-9]{1}|REGIONAL)|