When access is denied, also provide when possible and wanted, the needed
permissions so that in the future, user will be able to ask for
permission easily.
Renamed previous user handlers as admin user handlers.
Added non admin user handler /user/{uid} .
Add new `send_...` response to `CMS_API.response_api`, and use them
instead of `create {...RESPONSE}.... ; execute`.
Fixed potential issue with storage mailer initialization if folder does
not exist.
Added utf_8_encoded helpers function on CMS_API interface.
Fixed a few unicode potential issues.
Removed a few obsolete calls.
Added optional "mailer.subject_prefix" configuration item.
Added CMS_SETUP.utf_8_site_name for convenience.
Fixed a few potential unicode issues.
Fixed various typos.
as a consequence, removed usage of email_service library.
Updated the meaning for site.email to be sender email addressed.
Added notification.email to set the email address that will received system email notification.
