Keep the akiller's name when updating the reason.

The name of the oper issuing an akill or a sxline could be removed by updating the reason,
even though addkiller was enabled.
Update the French install instructions.
Update French language file.
Merge pull request #92 from Alef-Burzmali/2.0+update-fr

Update the French translation
Merge pull request #91 from Alef-Burzmali/2.0+fix-addakiller

Keep the akiller's name when updating the reason.
Fix log message when enabling botserv kickers
enc_bcrypt is no longer extra because it doesn't depend on external dependencies anymore
Move chan register event prior to applying final mode changes, so cs_mode can set mlock on register. #1620
Allow mlock to be enforced when unsetting defcon modes