* modules/ssl/ssl_engine_init.c (ssl_init_ctx_cleanup_proxy): Unset

pkp->certs pointer after freeing the array; fixes segfault at startup
if the certs are shared across >1 server_rec.

PR: 39915


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@417988 13f79535-47bb-0310-9956-ffa450edef68