Add commented-out patch section for LDK Git dependencies

For convenience we added ready-to-go `patch` setions to `Cargo.toml`,
which however only allowed us to quickly override official LDK releases.

Here we also add the corrsponding counterparts for LDK `git`
dependencies.

Author: tnull

Cargo.toml

@@ -168,3 +168,16 @@ harness = false
 
 #vss-client-ng = { path = "../vss-client" }
 #vss-client-ng = { git = "https://github.com/lightningdevkit/vss-client", branch = "main" }
+#
+#[patch."https://github.com/lightningdevkit/rust-lightning"]
+#lightning = { path = "../rust-lightning/lightning" }
+#lightning-types = { path = "../rust-lightning/lightning-types" }
+#lightning-invoice = { path = "../rust-lightning/lightning-invoice" }
+#lightning-net-tokio = { path = "../rust-lightning/lightning-net-tokio" }
+#lightning-persister = { path = "../rust-lightning/lightning-persister" }
+#lightning-background-processor = { path = "../rust-lightning/lightning-background-processor" }
+#lightning-rapid-gossip-sync = { path = "../rust-lightning/lightning-rapid-gossip-sync" }
+#lightning-block-sync = { path = "../rust-lightning/lightning-block-sync" }
+#lightning-transaction-sync = { path = "../rust-lightning/lightning-transaction-sync" }
+#lightning-liquidity = { path = "../rust-lightning/lightning-liquidity" }
+#lightning-macros = { path = "../rust-lightning/lightning-macros" }