nginx 0.3.57 *) Feature: the $ssl_client_serial variable. *) Bugfix: in the "!-e" operator of the "if" directive. Thanks to Andrian Budanstov. *) Bugfix: while a client certificate verification nginx did not send to a client the required certificates information. *) Bugfix: the $document_root variable did not support the variables in the "root" directive.