updated liteserver

- new methods for liteserver/liteclient
- added ADNL/DHT client-only work mode
- fixed crash in ADNL

adnl/adnl-packet.h

@@ -132,6 +132,9 @@ class AdnlPacket {
   auto signature() const {
     return signature_.clone();
   }
+  auto remote_addr() const {
+    return remote_addr_;
+  }
 
   void init_random();
 
@@ -188,6 +191,10 @@ class AdnlPacket {
     flags_ |= Flags::f_reinit_date;
   }
 
+  void set_remote_addr(td::IPAddress addr) {
+    remote_addr_ = addr;
+  }
+
  private:
   td::BufferSlice rand1_;
   td::uint32 flags_{0};
@@ -204,6 +211,8 @@ class AdnlPacket {
   td::int32 dst_reinit_date_{0};
   td::BufferSlice signature_;
   td::BufferSlice rand2_;
+
+  td::IPAddress remote_addr_;
 };
 
 }  // namespace adnl