bug: Fix roundup-admin security command. Lowercase optionalarg. Roles are indexed by lower case role name. So 'security User' and 'security user' should generate the same output. Also add testing for this case. Thread: https://sourceforge.net/p/roundup/mailman/roundup-users/thread/CAH-41398iTPhze7D_pZB8tqTBHF%3Dq6HYonbcG%2B%2BYN-ioDssXBw%40mail.gmail.com/#msg41557225 starting from: https://sourceforge.net/p/roundup/mailman/message/41557225/

Other Docs
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.. toctree::
   :maxdepth: 2

   docs/upgrading-history

   docs/tracker_templates

   Design Overview <docs/overview>
   Design (original) <docs/design>

   docs/developers

   Notes about the MySQL Database backend <docs/mysql>
   Notes about the PostgreSQL Database backend <docs/postgresql>

   Richard Jones implementation notes <docs/implementation>
   docs/security-history