Be more clear about selfsign option
Installing IPA server --selfsign option is currently a one-way ticket
to server with limited certificate capabilities. Make sure that user
really want to install it by implementing the following steps:
- moving the option to the bottom of certificate options section
- adding a warning to ipa-server-install man page
- adding a warning to ipa-server-install help
- adding a warning to ipa-server-install configuration summary
when one runs ipa-server-install
https://fedorahosted.org/freeipa/ticket/1908