The idea with HEIM_JSON_F_TRY_DECODE_DATA is that on parsing of JSON
texts, if we find a base64-encoded string, decode it. But a lot of
strings that aren't base64-encoded can be decoded anyways, leaving a
mess.
Insted we should -in a future commit- implement this only for the string
values of "heimdal-type-data-76d7fca2-d0da-4b20-a126-1a10f8a0eae6" names
in singleton objects.
- Add HEIM_JSON_F_ESCAPE_NON_ASCII to indicate that non-ASCII must be
escaped as \uXXXX.
- Add HEIM_JSON_F_NO_ESCAPE_NON_ASCII to force non-escaping of BMP
codepoints.
- If the locale's codeset is not UTF-8 and
HEIM_JSON_F_NO_ESCAPE_NON_ASCII is not set, then set
HEIM_JSON_F_ESCAPE_NON_ASCII.
- Add flags for indenting with 2, 4, or 8 spaces, still defaulting to
tabs if none of those are set.
- Don't emit a newline before emitting scalar values in dicts.
