[arch-dev-public] Replacing pycrypto with pycryptodome

[Evangelos Foutras]

Antonio suggested on IRC to drop pycrypto in favor of pycryptodome.
The latter is "an almost drop-in replacement for the old PyCrypto
library" according to its documentation. pycrypto has been
unmaintained for several years. [1]

Unless someone objects in the next few days, I'll proceed  to drop
python-crypto and add replaces=() to python-pycryptodome.

[1] https://github.com/dlitz/pycrypto/issues/173