[Kde-pim] POP3 KioSlave unreliable - please apply fix

[Sven-Ola Tuecke]

Hi,

recently upgraded to Kubuntu/Lynx (from Hardy, I'm now on Kmail-1.13.2, KDE 
4.4.2). Noticed a sporadic message box stating "Could not read file Invalid 
response from server:" and a single dot as "wrong". 

Took me some time to include debug code in order to find the root cause: the 
POP3 ioslave uses memcpy() to move the input buffer while src and dst overlaps. 
This in turn leads to e.g. the last 3 bytes of the buffer (.^M^J) to overwrite 
the buffer start -> boinks. Overlapping memcpy() has unpredictable results and 
a simple replacement by memmove() repairs that.

I write to this list, because the bugtracker does not indicate a vivid devel 
response, e.g. https://bugs.kde.org/show_bug.cgi?id=232245 is marked as fixed 
while bug still exists. A patch replacing 2 times memmove() in 
kioslave/pop3/pop3.cpp can be found on  
https://bugs.kde.org/show_bug.cgi?id=230072 but I'm pretty shure that also 
other bugreps are triggered by this, e.g. one my scan this list. 
https://bugs.kde.org/buglist.cgi?quicksearch=pop3

// Sven-Ola
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