f Extend reserve docs

Author: tnull

src/config.rs

@@ -190,6 +190,15 @@ pub struct AnchorChannelsConfig {
 	/// in order to have the required Anchor output spending and HTLC transactions confirmed when
 	/// the channel is closed.
 	///
+	/// If the channel peer is not marked as trusted via
+	/// [`AnchorChannelsConfig::trusted_peers_no_reserve`], we will always try to spend the Anchor
+	/// outputs with *any* on-chain funds available, i.e., the total reserve value as well as any
+	/// spendable funds available in the on-chain wallet. Therefore, this per-channel multiplier is
+	/// really a emergencey reserve that we maintain at all time to reduce reduce the risk of
+	/// insufficient funds at time of a channel closure. To this end, we will refuse to open
+	/// outbound or accept inbound channels if we don't have sufficient on-chain funds availble to
+	/// cover the additional reserve requirement.
+	///
 	/// **Note:** Depending on the fee market at the time of closure, this reserve amount might or
 	/// might not suffice to successfully spend the Anchor output and have the HTLC transactions
 	/// confirmed on-chain, i.e., you may want to adjust this value accordingly.