There are probably lots of other packages, too, but running logwatch now in my
daily cron jobs generates the following diagnostics:

Unescaped left brace in regex is deprecated, passed through in regex; marked by
<-- HERE in m/\G%{ <-- HERE Referer}i/ at
/usr/share/logwatch/scripts/services/http line 313.
Unescaped left brace in regex is deprecated, passed through in regex; marked by
<-- HERE in m/\G%{ <-- HERE Referer}i/ at
/usr/share/logwatch/scripts/services/http line 316.

A patch is available here:

<https://build.opensuse.org/package/view_file/home:mhnovell/logwatch/logwatch-http.patch?expand=1>