CI: use File::Temp to create temporary directory #343
Merged
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Before, ci/test-11-unpriv.pl used a hard-coded file name of /tmp/fping.copy to create an unprivileged copy of fping. This file was not deleted after it was no longer used.
Now, the unprivileged fping copy is created in a temporary directory that is deleted after all tests from the file.
This addresses GH issue #339.