Constant openssl_sys::SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
pub const SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS: c_uint = 0x0400;
The portability is definied by:
#[cfg(ossl111)]
pub const SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS: c_uint = 0x0400;
#[cfg(ossl111)]