LookupServer: Move into LookupServer namespace

Author: https://github.com/bugaevc
Commit: 314f966745
Pull-request: https://github.com/SerenityOS/serenity/pull/5238
Reviewed-by: https://github.com/alimpfard

Userland/Services/LookupServer/LookupServer.cpp

@@ -41,6 +41,8 @@
 #include <sys/time.h>
 #include <unistd.h>
 
+namespace LookupServer {
+
 LookupServer::LookupServer()
 {
     auto config = Core::ConfigFile::get_for_system("LookupServer");
@@ -277,3 +279,5 @@ Vector<String> LookupServer::lookup(const String& hostname, const String& namese
     }
     return responses;
 }
+
+}