in repository. If not, recipient will receive message that is not
encrypted to his private key and it will not open.

If this anyway happens, don't get stuck inside eternal loop
in privmsgsearchmodel.

to windows installer script.

cppcheck happy.

prevents very long delays in CLOSING state of socket. Applied formatting
cosmetics to new files.

install files that suit Qt 5.5.

Updated translations to include new string "embed image".

especially the "Any country" selection that is localized.

Additionally perform the scan every 2 hours due to possible outbound-port
address changes of UPnP routers that we can't easily detect.

Prevent embedding of timestamps in PNG files to make build reproducible by Reiner Herrmann.