Proposal with patch: Make socket directory host dependent

[Rainer Perske]

Hello,

I have just downloaded GnuPG 2.2.4 an will check the patch now.

Thanks again!

In my proposal, I had enlarged the character array "prefix" (now line 
557 of common/homedir.c) from "13 + 1 + 20 + 6 + 1" to "6 + "13 + 1 + 
20 + 6 + 1", the additional "6" is space for the characters "/gnupg" I 
had added to the prefix.

I do not understand yet how the figures 13 + 1 + 20 are calculated. 
Maybe I was too careful by enlarging the space, but I'd propose to 
check whether the array is still large enough for all possible cases 
(if you did not already do so).

Best regards
-- 
Rainer Perske
Abteilung Systembetrieb und Leiter der Zertifizierungsstelle (WWUCA)
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