This commit adds configuration for HTTPD to encrypt/decrypt its
key which we currently store in clear on the disc.
A password-reading script is added for mod_ssl. This script is
extensible for the future use of directory server with the
expectation that key encryption/decription will be handled
similarly by its configuration.
https://pagure.io/freeipa/issue/7421
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>
