nonstd::optional -> std::optional

llarp/config/config.cpp

@@ -226,12 +226,12 @@ namespace llarp
     };
 
     conf.defineOption<std::string>(
-        "dns", "upstream", false, true, nonstd::nullopt, [=](std::string arg) {
+        "dns", "upstream", false, true, std::nullopt, [=](std::string arg) {
           m_upstreamDNS.push_back(parseAddr(arg));
         });
 
     conf.defineOption<std::string>(
-        "dns", "bind", false, nonstd::nullopt, [=](std::string arg) { m_bind = parseAddr(arg); });
+        "dns", "bind", false, std::nullopt, [=](std::string arg) { m_bind = parseAddr(arg); });
   }
 
   LinksConfig::LinkInfo

llarp/config/definition.hpp

@@ -125,7 +125,7 @@ namespace llarp
       else if (not required and not multiValued)
         return defaultValue;
       else
-        return nonstd::nullopt;
+        return std::nullopt;
     }
 
     /// Returns the value at the given index.