hashindex_compact: use memmove for possibly overlapping copy
hashindex_compact: use memmove for possibly overlapping copy

edgewood/borg,RonnyPfannschmidt/borg,raxenak/borg,raxenak/borg,RonnyPfannschmidt/borg,raxenak/borg,edgewood/borg,RonnyPfannschmidt/borg,edgewood/borg,raxenak/borg,RonnyPfannschmidt/borg,edgewood/borg,RonnyPfannschmidt/borg