Journal data loss warning

[Gary C Martin]

Just a quick warning to developers hopping between old and new builds.  
Today while trying to debug an issue with DNS resolution behind an  
Access Point I reverted (from joyride-2149) to the official release  
Update-1 703 using olpc-update. After running some tests and then olpc- 
updating back up to the latest joyride-2159, I discovered all Journal  
entries had been wiped clean.

I vaguely remember some mention somewhere of the DS folder being moved  
or renamed, I guess mine just got zapped by that change. I'm assuming  
(hoping) it died going from 2149 back to 703, but can't be sure as I  
didn't check the Journal while in 703.

--Gary