Specify cryptographic dependencies as an extra
Specify cryptographic dependencies as an extra

Rather than leaving dependent cryptographic libraries as commented-out lines
in the setup script, mark them as requirements for the 'crypto' extra.

cicku/fedmsg,fedora-infra/fedmsg,pombredanne/fedmsg,fedora-infra/fedmsg,vivekanand1101/fedmsg,chaiku/fedmsg,chaiku/fedmsg,maxamillion/fedmsg,pombredanne/fedmsg,maxamillion/fedmsg,pombredanne/fedmsg,vivekanand1101/fedmsg,maxamillion/fedmsg,cicku/fedmsg,chaiku/fedmsg,vivekanand1101/fedmsg,cicku/fedmsg,fedora-infra/fedmsg