Description of problem:

We don't document the `rhc aliases` command or the equivalent `rhc alias list` command.


Version-Release number of selected component (if applicable):

OpenShift Online User Guide Edition 1.0


How reproducible:

Completely.


Steps to Reproduce:

1. Go to https://access.redhat.com/site/documentation/en-US/OpenShift_Online/2.0/html-single/User_Guide/index.html#sect-OpenShift-User_Guide-Command_Line_Interface-Custom_Domains_and_SSL_Certificates

2. Look for `rhc alias list` or `rhc aliases`.


Actual results:

I can't find a description or example of `rhc alias list` or `rhc aliases`.


Expected results:

I should see a description and example of using `rhc alias list` to list the aliases on an application.


Additional info:
Documenting `rhc alias list` would be consistent with the use of `rhc cartridge list` and `rhc sshkey list` elsewhere in the documentation.