rust protover doesn't canonicalize adjacent and overlapping ranges
`protover.c` accepts both `"Foo=1-3,4-5"` and `"Foo=1-3,2-5"` and then canonicalizes them into `"Foo=1-5"` with `contract_protocol_list()`. Rust rejects the 2nd one as malformed.
**Trac**:
**Username**: cyberpunks
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