French translation update

Signed-off-by: Francis Tisserant <tissf@free.fr>
French doc update: fix float value with old data

Signed-off-by: Francis Tisserant <tissf@free.fr>
pncconf -fix error with firmware with more then 5 sserial channels

Pncconf can only display 5 channels but the code checked for 8
in certain circumstances.
Docs: fix startup code example.
g1 without a feed rate is an error and is a bad example for the startup code
thanks to archivist for spotting this
Signed-off-by: John Thornton <jthornton@gnipsel.com>
docs: remove some broken asciidoc markup

(Variables) looks like an typoed attempt at creating an asciidoc anchor,
but it's not valid asciidoc anchor syntax so it doesnt work, and it
passes through into the generated docs, where it makes no sense.

None of the other asciidocs tries to use an anchor named Variables,
so just remove it.
Merge remote-tracking branch 'origin/v2.5_branch' into 2.6

For the fr.po conflict i simply discarded the Weblate fr.po from 2.6 and
used Francis Tisserant's version from 2.5.

Conflicts:
	docs/src/config/ini_config.txt src/po/fr.po