Count processed forks in stats (#1646)

nano/node/node.cpp

@@ -1565,6 +1565,7 @@ nano::process_return nano::block_processor::process_one (nano::transaction const
 			{
 				// Only let the bootstrap attempt know about forked blocks that not originate recently.
 				node.process_fork (transaction_a, block_a);
+				node.stats.inc (nano::stat::type::ledger, nano::stat::detail::fork, nano::stat::dir::in);
 			}
 			if (node.config.logging.ledger_logging ())
 			{

nano/node/stats.cpp

@@ -389,6 +389,9 @@ std::string nano::stat::detail_to_string (uint32_t key)
 		case nano::stat::detail::confirm_req:
 			res = "confirm_req";
 			break;
+		case nano::stat::detail::fork:
+			res = "fork";
+			break;
 		case nano::stat::detail::frontier_req:
 			res = "frontier_req";
 			break;

nano/node/stats.hpp

@@ -209,6 +209,7 @@ public:
 		change,
 		state_block,
 		epoch_block,
+		fork,
 
 		// message specific
 		keepalive,