minor, open lateglu files through mmapat_fn()
minor, make /v0/series/XXX return the contents of the super file
Revert "minor, open lateglu files through mmapat_fn()"

This reverts commit ec94e66e73741361491e5e7c6da995d9ea44135e.
Merge branch 'core/gandalfd'

* core/gandalfd:
  Revert "minor, open lateglu files through mmapat_fn()"
  minor, make /v0/series/XXX return the contents of the super file
  minor, open lateglu files through mmapat_fn()