qa/110: more diags for Unix domain socket case
qa/110: more diags for Unix domain socket case

For ubuntu1804i386-container failure in CI.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp