HTTP/3: reference h3c directly from ngx_http_connection_t. Previously, an ngx_http_v3_connection_t object was created for HTTP/3 and then assinged to c->data instead of the generic ngx_http_connection_t object. Now a direct reference is added to ngx_http_connection_t, which is less confusing and does not require a flag for http3.

/*
 * Copyright (C) Maxim Dounin
 * Copyright (C) Nginx, Inc.
 */


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


#if (NGX_HAVE_DLOPEN)

char *
ngx_dlerror(void)
{
    char  *err;

    err = (char *) dlerror();

    if (err == NULL) {
        return "";
    }

    return err;
}

#endif