Fixed: Exclude /snap/* locations from disk space

Closes #2743

src/NzbDrone.Mono/Disk/DiskProvider.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -268,8 +268,6 @@ namespace NzbDrone.Mono.Disk
             }
 
             return g.gr_gid;
-
-
         }
     }
 }

src/NzbDrone.Mono/Disk/ProcMountProvider.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -117,6 +117,12 @@ namespace NzbDrone.Mono.Disk
                 return null;
             }
 
+            if (mount.StartsWith("/snap/"))
+            {
+                // Mount point for snap packages
+                return null;
+            }
+
             var driveType = FindDriveType.Find(type);
 
             if (name.StartsWith("/dev/") || GetFileSystems().GetValueOrDefault(type, false))