I don't want to even have to think about people using this in production.
Use glnx_* functions in signature related pull code for clear error handling. Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>
Add test for signature verification of summary file during the pull. Adopted version of GPG tests from `test-pull-summary-sigs.sh`. Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>