hygiene, kick deprecated reverse lookup through corpus_term()

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
hygiene, kick old_cfreq test from fsck/fix routines

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'code/hygiene'

* code/hygiene:
  hygiene, kick old_cfreq test from fsck/fix routines
  hygiene, kick deprecated reverse lookup through corpus_term()