Support sending report to URL as POST

[hw8665]

For widespread checks across a large (and poorly managed) IT estate, it would be useful if spyre could support https:// URLs in addition to file:// ones.

If all spyre did was send a POST to the URL given containing the body of the report then the IR team could manage collecting all the reports and processing them centrally without having to work on collecting the logs from each instance of spyre that ran (and without having to get IT management to correctly set up a file share that all hosts can access to deposit logs centrally).

[hillu]

Sure, that's pretty much what I had in mind as I made the report target an URL.
PRs are welcome, of course. :-)