BUG/MINOR: jwt: Fix jwt_parse_alg incorrectly returning JWS_ALG_NONE

jwt_parse_alg would mistakenly return JWT_ALG_NONE for algorithms "",
"n", "no" and "non" because of a strncmp misuse. It now sees them as
unknown algorithms.

No backport needed.

Cc: Tim Duesterhus <tim@bastelstu.be>
1 file changed