default. Only the former checks/fixes are done if no items are given
on the command line. The latter must be requested explicitely.
Intended for "fixes" that are dangerous in some way, because they might
remove files that are still in use, for example.
Make the "sendmail" item disabled by default, it removes sendmail
configuration. Partly addresses PR install/36180.
Proposed on tech-userlevel, review and spelling fixes from lukem@.
9188cd99a0