Use std::unordered_map instead of map

[maxamula]

libhttp3/include/http3/http3_client_impl.h

Line 75 in 1001288

std::map<uint64_t, webtransport::Session::Impl*> wt_sessions;

libhttp3/include/http3/http3_server_impl.h

Line 58 in 1001288

std::map<uint64_t, webtransport::Session::Impl*> wt_sessions;

This will result in O(1) instead of O(log(n)) lookup