SSL: logging levels of "unsupported protocol", "version too low". Starting with OpenSSL 1.1.0, SSL_R_UNSUPPORTED_PROTOCOL instead of SSL_R_UNKNOWN_PROTOCOL is reported when a protocol is disabled via an SSL_OP_NO_* option. Additionally, SSL_R_VERSION_TOO_LOW is reported when using MinProtocol or when seclevel checks (as set by @SECLEVEL=n in the cipher string) rejects a protocol, and this is what happens with SSLv3 and @SECLEVEL=1, which is the default. There is also the SSL_R_VERSION_TOO_HIGH error code, but it looks like it is not possible to trigger it.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_PARSE_TIME_H_INCLUDED_
#define _NGX_PARSE_TIME_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


time_t ngx_parse_http_time(u_char *value, size_t len);

/* compatibility */
#define ngx_http_parse_time(value, len)  ngx_parse_http_time(value, len)


#endif /* _NGX_PARSE_TIME_H_INCLUDED_ */