[Rumus.A]

No
It is documented in current release of Apache HTTP Server.

REDIRECT_ environment variables are created from the environment variables which existed prior to the redirect. They are renamed with a REDIRECT_ prefix, i.e., HTTP_USER_AGENT becomes REDIRECT_HTTP_USER_AGENT.

REDIRECT_URL, REDIRECT_STATUS, and REDIRECT_QUERY_STRING are guaranteed to be set, and the other headers will be set only if they existed prior to the error condition.

here
_http://httpd.apache.org/docs/current/custom-error.html

However, it not very well document related to rewrite module.