Added dispose impl to X509ChainImplUnityTls

Author: AndreasReich

mcs/class/System/Mono.UnityTls/UnityTlsProvider.cs

@@ -82,7 +82,7 @@ internal override bool ValidateCertificate (
 					targetHost = targetHost.Substring (0, pos);
 			}
 
-			// convert cert to native
+			// convert cert to native or extract from unityTlsChainImpl.
 			var result = UnityTls.unitytls_x509verify_result.UNITYTLS_X509VERIFY_NOT_DONE;
 			UnityTls.unitytls_x509list* certificatesNative = null;
 			try

mcs/class/System/Mono.UnityTls/X509ChainImplUnityTls.cs

@@ -81,6 +81,12 @@ public override void Reset ()
 				elements = null;
 			}
 		}
+
+		protected override void Dispose (bool disposing)
+		{
+			Reset();
+			base.Dispose (disposing);
+		}
 	}
 }