ported commit 7487 from branch 0.5.5. Seems to fix loss of config files on windows.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7548 b45a01b8-16f6-495d-af2f-9b41ad6348cc
added additional debug info in rsgenexchange

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7549 b45a01b8-16f6-495d-af2f-9b41ad6348cc