Revert collection of bad stabilizations

Revert collection of bad stabilizations

The following is a squash of the following reverts:

Revert "dev-python/pyopenssl: fixing amdge-fbsd"

This reverts commit 4e058be4f713f961a477e3b09ad7e0e4a58e40b1.

Revert "dev-python/pyopenssl: 17.5.0 stablized amd64 arm arm64 hppa ia64 ~mips ppc ppc64 x86 under allarches"

This reverts commit 9df03df64db374b5bf01eb2dcc1ddc23ab48c28d.

Revert "dev-python/cryptography: 2.1.4 stablized allarches"

This reverts commit 86b95fdb15331f93b276c309abc3ce42c1390b50.

Revert "dev-python/asn1crypto: adding alpha for cryptography under allarches"

This reverts commit 25c17342050fb0c7da351968e1c559a5d1d4db07.

There was an existing rekeywording request for pyopenssl and these
packages (bug 626836). They should not have been stabilized on
architectures that had no existing keywords.