[horde] in horde_histories history_who = 'f'

[Steffen]

if an user adds/deletes/... events via CalDAV or ActiveSync or Mnemos or 
Tasks via "Task & notes" for Android, horde_histories gets an entry where 
history_who is 'f'. I do not have no user 'f' and the users in question do 
not configured this user 'f', but their own.

I've created a backtrace for one issue, when prefs_init() called user data 
for the non-existing user 'f'. Here _buildNote() called getUserName(), 
which queried horde_histories, which returned 'f'. The note is located in 
my notepad and I've setup the app to use my account.

If I add a new note with "Task& notes" for Android, I get a new entry in 
horde_histories with history_who = 'f'. The same applies, if I add a new 
event with CalDAV clients in KDE and Android.

Shouldn't history_who contain the username used to make the changes? 
Besides the fact, that there might exist the user "f".
Or might there a configuration mistake?

-- 
Steffen