add to features; fixup shipped etc

Author: mgravell

src/StackExchange.Redis/PublicAPI/PublicAPI.Shipped.txt

@@ -1848,4 +1848,8 @@ static StackExchange.Redis.RedisResult.Create(StackExchange.Redis.RedisValue[]!
 virtual StackExchange.Redis.RedisResult.Length.get -> int
 virtual StackExchange.Redis.RedisResult.this[int index].get -> StackExchange.Redis.RedisResult!
 StackExchange.Redis.ConnectionMultiplexer.AddLibraryNameSuffix(string! suffix) -> void
-StackExchange.Redis.IConnectionMultiplexer.AddLibraryNameSuffix(string! suffix) -> void
+StackExchange.Redis.IConnectionMultiplexer.AddLibraryNameSuffix(string! suffix) -> void
+StackExchange.Redis.RedisFeatures.ShardedPubSub.get -> bool
+static StackExchange.Redis.RedisChannel.Sharded(byte[]? value) -> StackExchange.Redis.RedisChannel
+static StackExchange.Redis.RedisChannel.Sharded(string! value) -> StackExchange.Redis.RedisChannel
+StackExchange.Redis.ClientInfo.ShardedSubscriptionCount.get -> int

src/StackExchange.Redis/PublicAPI/PublicAPI.Unshipped.txt

@@ -1,3 +1 @@
-StackExchange.Redis.RedisChannel.PatternMode.Sharded = 4 -> StackExchange.Redis.RedisChannel.PatternMode
-static StackExchange.Redis.RedisChannel.Sharded(byte[]? value) -> StackExchange.Redis.RedisChannel
-static StackExchange.Redis.RedisChannel.Sharded(string! value) -> StackExchange.Redis.RedisChannel
+

src/StackExchange.Redis/RedisChannel.cs

@@ -248,10 +248,6 @@ public enum PatternMode
             /// Always a pattern.
             /// </summary>
             Pattern = 2,
-            /// <summary>
-            /// Never a pattern.
-            /// </summary>
-            Sharded = 4, // treat as flags here
         }
 
         /// <summary>

src/StackExchange.Redis/RedisFeatures.cs

@@ -178,6 +178,11 @@ public RedisFeatures(Version version)
         /// </summary>
         public bool SetVaradicAddRemove => Version.IsAtLeast(v2_4_0);
 
+        /// <summary>
+        /// Are <see href="https://redis.io/commands/ssubscribe/">SSUBSCRIBE</see> and <see href="https://redis.io/commands/spublish/">SPUBLISH</see> available?
+        /// </summary>
+        public bool ShardedPubSub => Version.IsAtLeast(v7_0_0_rc1);
+
         /// <summary>
         /// Are <see href="https://redis.io/commands/zpopmin/">ZPOPMIN</see> and <see href="https://redis.io/commands/zpopmax/">ZPOPMAX</see> available?
         /// </summary>