blockchain: log more info when we reject an orphan

We want to know what happened when a block is wrongly rejected

src/cryptonote_core/blockchain.cpp

@@ -1425,7 +1425,9 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
   {
     //block orphaned
     bvc.m_marked_as_orphaned = true;
-    MERROR_VER("Block recognized as orphaned and rejected, id = " << id);
+    MERROR_VER("Block recognized as orphaned and rejected, id = " << id << ", height " << block_height
+        << ", parent in alt " << (it_prev != m_alternative_chains.end()) << ", parent in main " << parent_in_main
+        << " (parent " << b.prev_id << ", current top " << get_tail_id() << ", chain height " << get_current_blockchain_height() << ")");
   }
 
   return true;