Release: SEnginx v1.5.12

Changes:

    *) Feature: upgrade to original nginx 1.5.12, which fixes CVE-2014-0133 security problem.

    *) Feature: SEnginx supports OpenStack LBaaS now. Find more at:
                https://github.com/NeusoftSecurity/SEnginx-LBaaS-Driver

    *) Bugfix: In ngx_http_whitelist module, if resovler is not response/not reachable, nginx
               workers will hang up while reloading or shutting down due to socket leaks.

    *) Bugfix: Fix upstream checking issues when using tcp method.

    *) Bugfix: Segmentation fault may occur in ngx_http_neteye_security module.

Signed-off-by: paulyang <y_y@neusoft.com>