New message keys translation to french

Hi all.
Some 8 translations are currently missing in the harvester module (rev. 2397) for all languages but English.
I sorry for the late time (in the releasetest) in sending this out.

The 8 are:

Key 'domain.search.comments'
Key 'domain.search.crawlertraps'
Key 'domain.search.name'
Key 'domain.search.unknown'
Key 'errormsg;invalid.domain.search.criteria.0'
Key 'errormsg;no.matching.domains.for.query.0.when.searching.by.1'
Key 'prompt;enter.domain.query'
Key 'search.domains.by'