f - tell user they MUST check even TLVs before claiming

lightning/src/ln/channelmanager.rs

@@ -4406,6 +4406,11 @@ where
 	/// This is a variant of [`claim_funds`] that allows accepting a payment with custom TLVs with
 	/// even type numbers.
 	///
+	/// # Note
+	///
+	/// You MUST check you've understood all even TLVs before using this to
+	/// claim, otherwise you may unintentionally agree to some protocol you do not understand.
+	///
 	/// [`claim_funds`]: Self::claim_funds
 	pub fn claim_funds_with_known_custom_tlvs(&self, payment_preimage: PaymentPreimage) {
 		self.claim_payment_internal(payment_preimage, true);