tell people how to get the cursor to resume an iteration

StackExchange.Redis/StackExchange/Redis/IDatabase.cs

@@ -141,7 +141,7 @@ public interface IDatabase : IRedis, IDatabaseAsync
         IEnumerable<HashEntry> HashScan(RedisKey key, RedisValue pattern, int pageSize, CommandFlags flags);
 
         /// <summary>
-        /// The HSCAN command is used to incrementally iterate over a hash
+        /// The HSCAN command is used to incrementally iterate over a hash; note: to resume an iteration via <i>cursor</i>, cast the original enumerable or enumerator to <i>IScanning</i>.
         /// </summary>
         /// <returns>yields all elements of the hash.</returns>
         /// <remarks>http://redis.io/commands/hscan</remarks>
@@ -589,7 +589,7 @@ public interface IDatabase : IRedis, IDatabaseAsync
         IEnumerable<RedisValue> SetScan(RedisKey key, RedisValue pattern, int pageSize, CommandFlags flags);
 
         /// <summary>
-        /// The SSCAN command is used to incrementally iterate over set
+        /// The SSCAN command is used to incrementally iterate over set; note: to resume an iteration via <i>cursor</i>, cast the original enumerable or enumerator to <i>IScanning</i>.
         /// </summary>
         /// <returns>yields all elements of the set.</returns>
         /// <remarks>http://redis.io/commands/sscan</remarks>
@@ -782,7 +782,7 @@ public interface IDatabase : IRedis, IDatabaseAsync
         IEnumerable<SortedSetEntry> SortedSetScan(RedisKey key, RedisValue pattern, int pageSize, CommandFlags flags);
 
         /// <summary>
-        /// The ZSCAN command is used to incrementally iterate over a sorted set
+        /// The ZSCAN command is used to incrementally iterate over a sorted set; note: to resume an iteration via <i>cursor</i>, cast the original enumerable or enumerator to <i>IScanning</i>.
         /// </summary>
         /// <returns>yields all elements of the sorted set.</returns>
         /// <remarks>http://redis.io/commands/zscan</remarks>

StackExchange.Redis/StackExchange/Redis/IServer.cs

@@ -232,7 +232,7 @@ public partial interface IServer : IRedis
         IEnumerable<RedisKey> Keys(int database, RedisValue pattern, int pageSize, CommandFlags flags);
 
         /// <summary>
-        /// Returns all keys matching pattern; the KEYS or SCAN commands will be used based on the server capabilities.
+        /// Returns all keys matching pattern; the KEYS or SCAN commands will be used based on the server capabilities; note: to resume an iteration via <i>cursor</i>, cast the original enumerable or enumerator to <i>IScanning</i>.
         /// </summary>
         /// <remarks>Warning: consider KEYS as a command that should only be used in production environments with extreme care.</remarks>
         /// <remarks>http://redis.io/commands/keys</remarks>