[Bug]: memory leak if connection closed during handshake

[Luffbee]

What happened?

xquic/src/transport/xqc_conn.h

Lines 310 to 313 in 8fab2f9

	/* xqc_hs_buffer_t data buffer for crypto data from tls */
	xqc_list_head_t initial_crypto_data_list;
	xqc_list_head_t hsk_crypto_data_list;
	xqc_list_head_t application_crypto_data_list;

These 3 lists are not cleared when connection destroy, so if the connection is closed during handshake (e.g. caused by a timeout), the xqc_hs_buffer_ts in these lists will leak.

Steps To Reproduce

I found this bug in a customized version, so I'm not sure this can be reproduced.

Relevant log output

No response

[Kulsk]

fixed on #287