We have NGINX with SSL and automatically deploy with a script. We recently changed SSL certs and they were setup with a password, which makes it pretty hard to automatically deploy. I found this awesome tip on this blog http://blog.sosedoff.com/category/nginx/ for removing the password:
$ cp server.key server.key.org
$ openssl rsa -in server.key.org -out server.key
The newly created server.key file has no more passphrase in it.