FEAT-Authorization options

[CarlosOVillanueva]

Group membership fields for authorization were originally hard-coded into userenv.HasAdminRight(). These fields should be options under an authorization section in the config.toml file. This way, users can easily map LDAP security groups to access levels.

WANT

• authorization section in config.toml
• limitedaccess group field
• operatoraccess group field
• owneraccess group field
• owneraccess group added to userenv.HasAdminRight()
• owneraccess role added to delete operations