exposes is_server through connection objects

src/roles/client.hpp

@@ -114,6 +114,10 @@ public:
 		int32_t rand() {
             return m_endpoint.rand();
         }
+        
+        bool is_server() const {
+            return false;
+        }
 		
 		// should this exist?
 		boost::asio::io_service& get_io_service() {

src/roles/server.hpp

@@ -112,6 +112,10 @@ public:
             return 0;
         }
 		
+        bool is_server() const {
+            return true;
+        }
+        
 		// should this exist?
 		boost::asio::io_service& get_io_service() {
 			return m_endpoint.get_io_service();