[registry:2.7] update to alpine 3.11, remove apache2-utils
[registry:2.7] update to alpine 3.11, remove apache2-utils

Scanning the image showed some vulnerabilities, and apache2-utils
was not an essential dependency at runtime, only included for
"convenience", so has been removed.

diff: https://github.com/docker/distribution-library-image/compare/0b6ea3ba50b65563600a717f07db4cfa6f18f957...ab00e8dae12d4515ed259015eab771ec92e92dd4

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

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