Log to trace denied because of host whitelisting (#663)

When we deny a connection based on HTTP hostname log to trace the
rejected value.

Signed-off-by: Danno Ferrin <danno.ferrin@gmail.com>
Co-authored-by: Usman Saleem <usman@usmans.info>

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/graphql/GraphQLHttpService.java

@@ -209,8 +209,14 @@ public class GraphQLHttpService {
   }
 
   private boolean hostIsInWhitelist(final String hostHeader) {
-    return config.getHostsWhitelist().stream()
+    if (config.getHostsWhitelist().stream()
-        .anyMatch(whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()));
+        .anyMatch(
+            whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()))) {
+      return true;
+    } else {
+      LOG.trace("Host not in whitelist: '{}'", hostHeader);
+      return false;
+    }
   }
 
   public CompletableFuture<?> stop() {

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpService.java

@@ -371,8 +371,14 @@ public class JsonRpcHttpService {
   }
 
   private boolean hostIsInWhitelist(final String hostHeader) {
-    return config.getHostsWhitelist().stream()
+    if (config.getHostsWhitelist().stream()
-        .anyMatch(whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()));
+        .anyMatch(
+            whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()))) {
+      return true;
+    } else {
+      LOG.trace("Host not in whitelist: '{}'", hostHeader);
+      return false;
+    }
   }
 
   public CompletableFuture<?> stop() {

metrics/core/src/main/java/org/hyperledger/besu/metrics/prometheus/MetricsHttpService.java

@@ -161,8 +161,14 @@ class MetricsHttpService implements MetricsService {
   }
 
   private boolean hostIsInWhitelist(final String hostHeader) {
-    return config.getHostsWhitelist().stream()
+    if (config.getHostsWhitelist().stream()
-        .anyMatch(whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()));
+        .anyMatch(
+            whitelistEntry -> whitelistEntry.toLowerCase().equals(hostHeader.toLowerCase()))) {
+      return true;
+    } else {
+      LOG.trace("Host not in whitelist: '{}'", hostHeader);
+      return false;
+    }
   }
 
   @Override