better response
fix loading of passphrase-protected keys.
Remove some double free on fusebuf datas.

Found the hard way and ok mpk@
limit the number of envelopes to recall in the hoststat cache.
Add missing files for luna88k.

ok miod@
update fb_setup(9) to follow changes that occurs in struct fusebuf few
month ago. Add also a few words about fb_delete(9).

ok jmc@