coap_block.c: Fix returning 2.03 for ETag match #1545
Merged
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Tag server returned data with a digest computed ETag option value so requests with an ETag option can return 2.03 if there is a match.
The size of bytes hash that is computed for the ETag can be overwritten by localy defining COAP_ETAG_MAX_BYTES to be a value between 1 and 8 bytes inclusive. It is set to 4 by default.