CVE request: Buffer overflow in das_watchdog

[Florian Weimer <fw () deneb enyo de>]

This was privately reported to Debian, but the developer published a
fix before we could assign a CVE ID.

Adam Sampson discovered that das_watchdog, a daemon to detect and
pause real-time processes which are misbehaving, contains an
exploitable buffer overflow in the handling of the XAUTHORITY
environment variable.

Upstream commit:

<https://github.com/kmatheussen/das_watchdog/commit/bd20bb02e75e2c>