Something like SSL_CTX_set_alpn_select_cb for ciphers and ssl/tls protocol version

[Alexander Gryanko]

Hello,

I'm looking for the way to do something like SSL_CTX_set_alpn_select_cb but
for ciphers and ssl/tls protocol version. As I see
ssl_choose_server_version and ssl3_choose_cipher has no any callbacks in
tls_early_post_process_client_hello. Is there any way to disable protocols
for some cases? Something like A/B testing with 50% of traffic with enabled
Chacha20 and 50% of traffic with disabled.

Thank you.

-- 
С уважением,
Александр Грянко
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