Fix/ntoken accumulator

[clemlak]

Cf:

• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1535986946
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545456955
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545455990
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545449924
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545449895
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545017189
• https://github.com/cantinasec/review-primitive-excalibur/pull/7#discussion_r1545015114

[kinrezC]

Don't merge this yet, I'm going to be focused on getting the ntoken fixes in tomorrow. Lots of stuff broken after fixing the accumulator stuff.