Distinguish between fatal and user-supplied-input errors, return
error descriptive text in a strbuf to allow dynamic content, apply
user-supplied field assgnments/deletions _after_ copying existing
manifest fields, use exit status 4 (invalid manifest) when applying
journal append to a non-journal or vice versa
/restful/meshms/newsince/SID1/SID2/newsince/TOKEN/messagelist.json now
always lists an ACK as soon as it is received, instead of waiting for a
message to arrive as well.
Add RHIZOME_BUNDLE_STATUS_READONLY enum value
Tighten up switch statements on bundle and payload status enums (no
default labels)
Rename some recently added enum entries
Return bundle status and payload status in HTTP responses
Add test for failing to decrypt a foreign encrypted bundle payload,
fix bug that caused an assertion failure
Add tests for fetching a non-existent manifest and fetching bundles
whose payload blob is not in the store
/restful/meshms/SID/SID/sendmessage now enforces Content-Disposition:
form-data (was ignoring), and enforces Content-Type: text/plain;
charset=utf-8 (was ignoring)
New negative test cases to ensure that these are treated strictly
