Bug#981330: coturn: wrong logic for the dpkg-statoverride handling in coturn.postrm

[Michael Prokop]

Package: coturn
Version: 4.5.2-1
Severity: important

Hi,

the coturn.postrm uses a wrong logic for the dpkg-statoverride handling,
causing to properly handle package (re)installation/removal, quoting from
a piuparts run:

| Fetched 36.8 MB in 0s (85.1 MB/s)
| dpkg: unrecoverable fatal error, aborting:
|  unknown system group 'turnserver' in statoverride file; the system group got removed
| before the override, which is most probably a packaging bug, to recover you
| can remove the override manually with dpkg-statoverride
| E: Sub-process /usr/bin/dpkg returned an error code (2)

I'll provide a PR as soon as I've a bug number from Debian's BTS.

FTR: I tend to call this a RC bug, but leaving this up to the
maintainer to decide (though it would be great if the package gets
fixed for bullseye).

regards
-mika-