Add compatibility note on ResetConnectionAsync.

Author: bgrainger

docs/content/api/MySqlConnector/MySqlConnection/ResetConnectionAsync.md

@@ -19,6 +19,10 @@ public ValueTask ResetConnectionAsync(
 
 A `ValueTask` representing the asynchronous operation.
 
+## Remarks
+
+This is an optional feature of the MySQL protocol and may not be supported by all servers. It's known to be supported by MySQL Server 5.7.3 (and later) and MariaDB 10.2.4 (and later). Other MySQL-compatible servers or proxies may not support this command.
+
 ## See Also
 
 * class [MySqlConnection](../../MySqlConnectionType/)

src/MySqlConnector/MySqlConnection.cs

@@ -423,6 +423,9 @@ internal async Task OpenAsync(IOBehavior? ioBehavior, CancellationToken cancella
 		/// </summary>
 		/// <param name="cancellationToken">A token to cancel the asynchronous operation.</param>
 		/// <returns>A <c>ValueTask</c> representing the asynchronous operation.</returns>
+		/// <remarks>This is an optional feature of the MySQL protocol and may not be supported by all servers.
+		/// It's known to be supported by MySQL Server 5.7.3 (and later) and MariaDB 10.2.4 (and later).
+		/// Other MySQL-compatible servers or proxies may not support this command.</remarks>
 #if NET45 || NET461 || NET471 || NETSTANDARD1_3 || NETSTANDARD2_0
 		public async Task ResetConnectionAsync(CancellationToken cancellationToken = default)
 #else