--hc=-1 refer to the last calculation of the current user again [skip hazardlib][demos]
--hc=-1 refer to the last calculation of the current user again [skip hazardlib][demos]


Former-commit-id: f6c69e429a655e45c2d6b8f5648e3f0dc830d9a5 [formerly e715adcc7993bffef550ad6d2618cfaf3a428f7c]
Former-commit-id: 12fdcb308d543479c93d05e978bd91906fed3c23
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine