minor, provide rotz-fsck to encapsulate tcbmgr's optimize routine

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, provide man page for rotz-fsck

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/fsck' into next

* cmd/fsck:
  doc, provide man page for rotz-fsck
  minor, provide rotz-fsck to encapsulate tcbmgr's optimize routine
Merge branch 'next'

* next:
  doc, provide man page for rotz-fsck
  minor, provide rotz-fsck to encapsulate tcbmgr's optimize routine