Add more bitcoind-related setup logging

At startup it sometimes appear we may be hanging when setting up
bitcoind. Add more loading to give more information about what's taking
long to setup (for instance, loading the watchonly wallet).

src/bitcoin/d/mod.rs

@@ -265,7 +265,9 @@ impl BitcoinD {
             watchonly_wallet_path: watchonly_wallet_path.clone(),
             retries: 0,
         };
+        log::info!("Checking the connection to bitcoind.");
         dummy_bitcoind.check_connection()?;
+        log::info!("Connection to bitcoind checked.");
 
         // Now the connection is checked, create the clients with an appropriate timeout.
         let node_client = Client::with_transport(

src/lib.rs

@@ -292,12 +292,14 @@ fn setup_bitcoind(
             wo_name,
         )?;
 
+        log::info!("Creating a new watchonly wallet on bitcoind.");
         bitcoind.create_watchonly_wallet(&config.main_descriptor)?;
-        log::info!("Created a new watchonly wallet on bitcoind.");
+        log::info!("Watchonly wallet created.");
     }
+    log::info!("Loading our watchonly wallet on bitcoind.");
     bitcoind.maybe_load_watchonly_wallet()?;
     bitcoind.wallet_sanity_checks(&config.main_descriptor)?;
-    log::info!("Connection to bitcoind established and checked.");
+    log::info!("Watchonly wallet loaded on bitcoind and sanity checked.");
 
     Ok(bitcoind)
 }

tests/test_framework/lianad.py

@@ -119,7 +119,7 @@ def start(self):
         self.wait_for_logs(
             [
                 "Database initialized and checked",
-                "Connection to bitcoind established and checked.",
+                "Watchonly wallet loaded on bitcoind and sanity checked.",
                 "JSONRPC server started.",
             ]
         )