Add support for shows.acast.com #2893

Job	Run time	Billable time
Select tests from inputs	1s	0s
Linter	19s	0s
Run tests (ubuntu-20.04, 2.7, cpython, core, sh)	1m 0s	0s
Run tests (ubuntu-20.04, 3.2, cpython, core, sh)	1m 6s	0s
Run tests (ubuntu-20.04, 3.5, cpython, core, sh)	1m 15s	0s
Run tests (ubuntu-20.04, 3.9, cpython, core, sh)	1m 8s	0s
Run tests (ubuntu-20.04, 3.11, cpython, core, sh)	56s	0s
Run tests (ubuntu-20.04, pypy-2.7, cpython, core, sh)	2m 25s	0s
Run tests (ubuntu-20.04, pypy-3.6, cpython, core, sh)	2m 34s	0s
Run tests (ubuntu-20.04, pypy-3.7, cpython, core, sh)	2m 55s	0s
Run tests (windows-2019, 3.4, cpython, core, bat)	2m 12s	0s
Run tests (windows-2019, 3.4, cpython, nodownload, bat)	1m 0s	0s
Run tests (ubuntu-20.04, 2.7, jython, core, sh)	3m 15s	0s
Run tests (ubuntu-20.04, 2.7, jython, nodownload, sh)	28s	0s
	20m 34s	0s

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