Early ACME drafts supported a notion of "combinations" of challenges that had to be completed together. This was removed from subsequent drafts. Boulder has only ever supported "combinations" that exactly map to the list of challenges, 1 for 1. This removes all the plumbing for combinations, and adds a list of combinations to the authz JSON right before marshaling it in WFE1.  | 
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| .. | ||
| csr.go | ||
| csr_test.go | ||