Update the mirror test goldens, fix --capture on Python 3

[refi64]

Description of the Change

CI was failing due to the mirror test goldens being outdated, so those were updated, as well as --capture being fixed on Python 3.

Checklist

• [ ] unit-test added (if change is algorithm)
• [ ] functional test added/updated (if change is functional)
• [ ] man page updated (if applicable)
• [ ] bash completion updated (if applicable)
• [ ] documentation updated
• [x] author name in AUTHORS

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (f1649a6) 74.85% compared to head (8b4a7be) 74.93%. Report is 4 commits behind head on master.

Files	Patch %	Lines
pgp/openpgp.go	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1244 +/- ## ========================================== + Coverage 74.85% 74.93% +0.07% ========================================== Files 143 143 Lines 16187 16181 -6 ========================================== + Hits 12117 12125 +8 + Misses 3134 3122 -12 + Partials 936 934 -2 ```

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[refi64]

beautiful.

(not sure why codecov is failing, this PR did not touch any Go code files.)

[neolynx]

oh ! I was working on the same, but I moved all unstable internet sources to s3, so we have reproducible testing.

however, I wonder if your python change would still be needed. could you check ?

[neolynx]

I guess this is not needed anymore, thanks anyway !