f indicate which version stopped creating "legacy" payments

Author: TheBlueMatt

lightning/src/chain/channelmonitor.rs

@@ -1493,11 +1493,11 @@ impl<Signer: EcdsaChannelSigner> ChannelMonitor<Signer> {
 	/// This is used to provide payment preimage(s) out-of-band during startup without updating the
 	/// off-chain state with a new commitment transaction.
 	///
-	/// It is used only for legacy pending payments on upgrade, and the flow that uses it assumes
-	/// that this [`ChannelMonitor`] is persisted prior to the [`ChannelManager`] being persisted
-	/// (as the state necessary to call this method again is removed from the [`ChannelManager`]
-	/// and thus a persistence inversion would imply we do not get the preimage back into this
-	/// [`ChannelMonitor`] on startup).
+	/// It is used only for legacy (created prior to LDK 0.1) pending payments on upgrade, and the
+	/// flow that uses it assumes that this [`ChannelMonitor`] is persisted prior to the
+	/// [`ChannelManager`] being persisted (as the state necessary to call this method again is
+	/// removed from the [`ChannelManager`] and thus a persistence inversion would imply we do not
+	/// get the preimage back into this [`ChannelMonitor`] on startup).
 	///
 	/// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
 	pub(crate) fn provide_payment_preimage_unsafe_legacy<B: Deref, F: Deref, L: Deref>(