computeHAWK: tolerate options={payload:undefined}
rearrange debug noise to occur in a less-confusing order
fix implementation/notion of "now" (uses ms, not s)
more debug noise
HAWK.doRequest: add body=
HAWK.signCertificate: add body, might work
jwcrypto.jsm: add debug noise
comment out https-only test
debug noise, minor test improvement