https://wiki.debian.org/DebianRepository/Format#Signed-By says:
> **Signed-By**
> An optional field containing a comma separated list of
> OpenPGP key fingerprints to be used for validating
> the next Release file. The fingerprints must consist
> only of hex digits and may not contain spaces.
> The fingerprint specifies either the key the Release file
> must be signed with or the key the signature key must be
> a subkey of. The later match can be disabled by appending
> an exclamation mark to the fingerprint.
>
> If the field is present, a client should only accept future updates
> to the repository that are signed with keys listed in the field.
> The field should be ignored if the Valid-Until field is not present
> or if it is expired.
For both the CLI tools and JSON, the field is taken as a string verbatim.
When specified, we must also provide `Valid-Until` field,
and i'm not sure there is an 'infinity' value for it,
so 100 years will have to do?
Fixes https://github.com/aptly-dev/aptly/issues/1497
Enabling coverage near-doubles the incremental build time and adds
overhead to individual tests on the order of **5-10x** or more. It's not
essential to have this for quick local system-test runs, so add an option
to disable it.
When aptly crashes it is possible to get a corrupt database with a dangling key reference.
This results in an error with 'key not found', eg:
ERROR: unable to load package Pall example-package 1.2.3 778cf6f877bf6e2d: key not found
This change makes `db recover` fix this situation by removing the dangling references.
sort both aptly output and gold file. output original output for
debugging on failure.
* Makefile: enable CAPTURE=1 env variable for capturing gold files
* docker-system-test: use AWS env vars for S3 tests
* fix system tests timing issue with order of gpg logs in publish tests
The fix of the -with-filter flag causes the following previously
missing source files to be downloaded, so I updated the test file.
```
rkward_0.7.5-1~bullseyecran.0.debian.tar.xz
rkward_0.7.5-1~bullseyecran.0.dsc
rkward_0.7.5.orig.tar.gz
rpy2_3.5.12-1~bullseyecran.0.debian.tar.xz
rpy2_3.5.12-1~bullseyecran.0.dsc
rpy2_3.5.12.orig.tar.gz
```
