/select changes between 4 and 5

[Mike Thomsen]

With 4.10, we used to post JSON like this example (part of it is Python) to
/select:

{
    "q": "LONG_QUERY_HERE",
    "fq": fq,
    "fl": ["id", "title", "date_of_information", "link", "search_text"],
    "rows": 100,
    "wt": "json",
    "indent": "true",
    "_": int(time.time())
}

We just upgraded to 5.4.1, and now we can't seem to POST anything to
/select. I tried it out in the admin tool, and it only does GET operations
against /select (tried changing it to POST and moving query string to the
body with Firefox dev tools, but that failed).

Is there a way to keep doing something like what we were doing or do we
need to limit ourselves to GETs? I think our queries are all small enough
now for that, but it would helpful to know for planning.

Thanks,

Mike