[sync] Sync experience HP2410 with Sync4j client again.

[Han Spruyt]

> Another problem I found while testing is that when I sync more events
> prom PDA to Kronolith, only one of them ends up in my calendar. The
> other way round is OK.
>
Problem appears to be here the suid, being a <DateTime string>@server  
with a precision of one second. Therefore, if more than one events are  
imported per second they get the same suid and only one of them gets  
imported.

Han.