UsersController::view() and edit() assigned their permission check with
`$canX = A or B;`. `=` binds tighter than `or`, so only A was stored and the
self check was dropped: with ZM_USER_SELF_EDIT on, a user without System=Edit
got 401 on PUT users/<own id>.json. beforeFilter() also refused every user
with System=None before view() or edit() ran.
Let beforeFilter() through view and edit of the user's own record while
ZM_USER_SELF_EDIT is on, use || in both checks, and limit what such a user
saves to the fields the web UI allows for self edit
(includes/actions/user.php): Password, Language and HomeView. The request
data is rebuilt from those three fields, so Id, System, permissions and the
rest are never saved; a Language without a lang file is refused as in the UI.
Users with System=Edit save as before.
Self view follows the web UI too: a user without System permission sees their
own record only while ZM_USER_SELF_EDIT is on.
fixes#5242
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
