nanocoap: add coap_opt_add_uri_path_with_len() #15697
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Contribution description
It can often be handy to append a non-0 terminated string to a path, e.g. because only a substring should be added or the result of a function that doesn't NULL-terminate strings (
base64url_encode()
,strncpy()
).Add a helper function for that case, that acts just as
coap_opt_add_uri_path()
but allows to specify a length.Testing procedure
Issues/PRs references