Revert "rm Bitmessage (reason: secupost.net IP vulnerability #465)"

This reverts commit bdc11204e8ccb193348f75064bb7eb8ccf564365.
Revert "remove note about Bitmessage in de.json"

This reverts commit 1ed3c74d5ed0bfec163901d28e8b40095a05ef59.