Added span backport

.gitmodules

@@ -32,3 +32,6 @@
 [submodule "external/oxen-libquic"]
 	path = external/oxen-libquic
 	url = https://github.com/oxen-io/oxen-libquic.git
+[submodule "external/span-lite"]
+	path = external/span-lite
+	url = https://github.com/martinmoene/span-lite.git

external/span-lite

@@ -0,0 +1 @@
+Subproject commit bc08bf87258d881aaa83b50c54dea67ea33d0e8e

llarp/router/outbound_session_maker.cpp

@@ -5,7 +5,7 @@
 #include <llarp/link/server.hpp>
 #include <llarp/router_contact.hpp>
 #include <llarp/nodedb.hpp>
-#include "i_rc_lookup_handler.hpp"
+#include "rc_lookup_handler.hpp"
 #include <llarp/link/link_manager.hpp>
 #include <llarp/util/meta/memfn.hpp>
 #include <llarp/util/thread/threading.hpp>
@@ -159,7 +159,7 @@ namespace llarp
   OutboundSessionMaker::Init(
       AbstractRouter* router,
       LinkManager* linkManager,
-      I_RCLookupHandler* rcLookup,
+      RCLookupHandler* rcLookup,
       Profiling* profiler,
       EventLoop_ptr loop,
       WorkerFunc_t dowork)

llarp/router/outbound_session_maker.hpp

@@ -82,7 +82,7 @@ namespace llarp
     Init(
         AbstractRouter* router,
         LinkManager* linkManager,
-        I_RCLookupHandler* rcLookup,
+        RCLookupHandler* rcLookup,
         Profiling* profiler,
         EventLoop_ptr loop,
         WorkerFunc_t work);
@@ -127,7 +127,7 @@ namespace llarp
 
     AbstractRouter* _router = nullptr;
     LinkManager* _linkManager = nullptr;
-    I_RCLookupHandler* _rcLookup = nullptr;
+    RCLookupHandler* _rcLookup = nullptr;
     Profiling* _profiler = nullptr;
     std::shared_ptr<NodeDB> _nodedb;
     EventLoop_ptr _loop;

llarp/router/rc_lookup_handler.hpp

@@ -1,6 +1,5 @@
 #pragma once
 
-
 #include <llarp/router_id.hpp>
 #include <llarp/util/thread/threading.hpp>