Example IRAA! Sessions

Example IRAA! sessions:

A sample transaction between example.com and university.edu, where example.com allows any active student, faculty, or staff member to make a transaction.
- User visits http://www.example.com/cgi/show?c=university.edu
- example.com discovers the name of the university.edu Proxy Authentication Server
- example.com redirects user to https://auth.university.edu:443/iraa/login?service=example.com&destination=http://www.example.com/cgi/show?c=university.edu
- university.edu prompts user for authentication information
- university.edu redirects user to http://www.example.com/cgi/show?c=university.edu?ticket=ABC123DEF456
- example.com discovers the name of the university.edu Attribute Verification Server.
- example.com directly calls https://auth.university.edu:443/iraa/authorize?ticket=ABC123DEF456&service=example.com&authz=memberofany+student.university.edu+faculty.university.edu+staff.university.edu
- university.edu returns an encrypted, persistent identifier along with authentication and authorization confirmation:
```
 yes
 2b25f56dca1f3fa98be7b3180b70fc4a
 yes
 
```
A sample transaction between example.com and university.edu, where example.com needs to know if the user is a student, faculty, or staff in order to offer the appropriate information.
- User visits http://www.example.com/cgi/show?c=university.edu
- example.com discovers the name of the university.edu Proxy Authentication Server
- example.com redirects user to https://auth.university.edu:443/iraa/login?service=example.com&destination=http://www.example.com/cgi/show?c=university.edu
- university.edu prompts user for authentication information
- university.edu redirects user to http://www.example.com/cgi/show?c=university.edu?ticket=ABC123DEF456
- example.com discovers the name of the university.edu Attribute Verification Server.
- example.com directly calls https://auth.university.edu:443/iraa/authorize?ticket=ABC123DEF456&service=example.com&authz=whichof+student.university.edu+faculty.university.edu+staff.university.edu
- university.edu returns an encrypted, persistent identifier along with authentication and authorization confirmation:
```
 yes
 2b25f56dca1f3fa98be7b3180b70fc4a
 staff.university.edu
 student.university.edu
 
```