[TYPO3-project-4-3] fe_users Migration from 4.2 to 4.3

[Matthias Krappitz]

Hi,

we got projects running on 4.2 with frontend users and their passwords still 
in plain-text in the database. We now want to upgrade to 4.3 these systems 
and also change this un-encrypted password issue. But for now after just 
having upgraded from 4.2.10 to 4.3 RC2 all frontend users (with their 
passwords still in plain-text in fe_users table) can only login once and are 
not logged in any more on the next page load they do after their login. We 
use the felogin-Extension from the core and nothing else so far.

So is there any documentation what steps we need to do, to bring back the 
frontend login for now with plain-text passwords in 4.3 (or is this not 
possible?) and how to migrate all the users passwords in the fe_users table? 
Do we just need to md5 them by sql-update? Are there any special settings 
for the felogin extension needed or additional extensions to enable 
encrypted passwords?

Cheers

Matthias