This is very popular in custom card or rush duel communities. So we have to change it back.

* use memcpy in DuelClient, NetServer

* NetServer: discard too large packet

* DuelClient: discard too large packet

* replace memcpy with std::memcpy

* disconnect when the packet is too large

* check packet_len

* check len in HandleCTOSPacket()

* check len in HandleSTOCPacketLan()

* remove bool type in HostInfo

* check len in packet handling

* add boundary check to STOC_CHAT packet

* use memcpy in DuelMode::JoinGame

* add DECK_MAX_SIZE, DECK_MIN_SIZE

* fix DuelMode::UpdateDeck()

* fix

* fix Manager::OpenDeckFile()

* update DuelMode init

* update DuelMode::JoinGame

* update DuelMode::GetResponse

* Revert "check len in packet handling"

This reverts commit 2b5c12f3.

* use memcpy in GetPosition

* check struct size by static_assert

* update DuelMode::UpdateDeck

* check if the struct is trivially copyable

* replace unsigned short to uint16_t

* replace unsigned int to uint32_t

* add padding member to STOC_HS_PlayerEnter

* workaround: use STOC_HS_PlayerEnter_size

This reverts commit 2b5c12f3.