keystone configuration docs missing some keystone-manage commands

[Eric Brown]

The keystone configuration docs are missing info on all of the keystone-manage commands.

See http://docs.openstack.org/developer/keystone/configuration.html#initializing-keystone

Missing are:
 domain_config_upload
 fernet_rotate
 fernet_setup

However, the man page for keystone-manage does contain info.

       ? domain_config_upload: Upload domain configuration file.

       ? fernet_rotate: Rotate keys in the Fernet key repository.

       ? fernet_setup: Setup a Fernet key repository.

[Lance Bragstad (lbragstad)]

Not sure why this didn't get reported in the comments but this is the patch set that closes this out:

https://review.openstack.org/#/c/193663/