NetconfAccess: allow connection over a pair of FDs

Change-Id: I99c5f22195e3f9566b9b51a5cb0c70d42c126450
diff --git a/src/netconf_access.hpp b/src/netconf_access.hpp
index d6100a7..29dfd75 100644
--- a/src/netconf_access.hpp
+++ b/src/netconf_access.hpp
@@ -31,6 +31,7 @@
 public:
     NetconfAccess(const std::string& hostname, uint16_t port, const std::string& user, const std::string& pubKey, const std::string& privKey);
     NetconfAccess(const std::string& socketPath);
+    NetconfAccess(const int source, const int sink);
     NetconfAccess(std::unique_ptr<libnetconf::client::Session>&& session);
     ~NetconfAccess() override;
     [[nodiscard]] Tree getItems(const std::string& path) const override;