Hi,

Current the org-log-into-drawer function does not honor the value of
the LOG_INTO_DRAWER property if the property has the value nil. For
example, if the org-log-into-drawer variable is set to t, but we have
the file:

  * Foo
    :PROPERTIES:
    :LOG_INTO_DRAWER: nil
    :END:
  ** TODO Bar

org-mode will log changes to the TODO entry into a drawer. The
attached patch fixes the issue, allowing a nil value of the
LOG_INTO_DRAWER property to override a t value of the
org-log-into-drawer variable.

best, Erik