fr.po: commit file after only "update-po" so actual is readable.
po/fr: update my email address and copyright years.
po/fr: several minor updates and better wording.

Meaning doesn't change at all: it's only for better wording and/or
formatting of a few strings.
po/fr: remove fuzzy marker for error messages that will be kept in English.

The following is a copy of a comment inside fr.po:

Note from translator on "file status flags".
The following entry is kept un-translated on purpose. It is difficult to
translate and should only happen in exceptional circumstances which means
that translating would:
- lose some of the meaning
- make it more difficult to look up in search engines; it might happen one
in
a million times, if we dilute the error message in 20 languages, it will be
almost impossible to find an explanation and support for the error.
po/fr: translations for --threads, --block-size and --block-list.
po/fr: last batch of new translations for now.

Four new error messages.
po/fr: fix several typos that have been around since the beginning.
po/fr: yet another place where my email address had to be updated.
po/fr: several more translation updates: reword and handle --ignore-check.