nixguix: Improve further tarball detection
The current content type detection was a bit off mostly for content which includes charset. This commit fixes it.
Related to T3781
Migrated from D8624 (view on Phabricator)
Staging instance, all changes can be removed at any time
The current content type detection was a bit off mostly for content which includes charset. This commit fixes it.
Related to T3781
Migrated from D8624 (view on Phabricator)