mod_report_forward: Fix traceback on error message passed to datetime function If archive:get() returns an error, e.g. because it can't find a message with the given ID, it may return e.g. nil, "item-not-found" or similar where the error condition ends up in reported_message_time, which gets passed to util.datetime, which thus ends up doing math to a string or error object.

---
superseded_by: mod_bookmarks
labels:
- 'Stage-Obsolete'
summary: Synchronise bookmarks between Private XML and PEP
...

::: {.alert .alert-warning}
This module is obsolete, please use [mod_bookmarks included with Prosody][doc:modules:mod_bookmarks]
:::