Expose whether total_size is the same as limit.

Allows telling user whether what he sees is the whole result set, or just
a limited sample of it.
Tell user when he is only viewing a sample of a larger object set.

Provide compatibility with non-upgraded products.
Also, update erp5_l10n_fr translation.
Do not provide a count_method by default.

Counting all documents matching some criterion has a cost proportional to
the number of those documents. Modules grow large easily (the effect
becomes quite noticeable from ~50k), and this information costs too much.
Simplify code.

Do not hand-pick parameters from request, publisher provides them readily.
Do not provide deprecated password_confirm argument.
Reduce indentation.
Cleanup changeUserPassword.

Drop deprecated arguments, follow naming conventions, check assumption,
improve docstring.
Simplify and fix key generation.

No need for an UUID, approximate or not. Just use a plain random number
(keep it a 32-hex-char string for homogeneity).
Check for collisions with an existing entry, while imposing a limit to the
number of tries.
Drop unused method.
Inline getResetPasswordUrl and getExpirationDateForKey.