Bug#876058: xvfb-run does not use /bin/bash in shebang line

[Rian Hunter <rian@alum.mit.edu>]

Package: xvfb
Version: 2:1.19.3-2
Severity: normal

xvfb-run uses "#!/bin/sh" as its shebang line. This is wrong because
it uses bash-specific features like "trap on_cleanup EXIT".  This is
especially broken when "#/bin/sh" links to "dash" (now the default
shell on debian systems).

This causes the Xvfb process to stick around when the child X client finishes.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages xvfb depends on:
ii  libaudit1                 1:2.5.2-1
ii  libbsd0                   0.8.3-1
ii  libc6                     2.24-17
ii  libgcrypt20               1.7.0-2
ii  libgl1-mesa-glx [libgl1]  11.1.2-1
ii  libpixman-1-0             0.33.6-1
ii  libselinux1               2.6-3+b1
ii  libsystemd0               234-2.3
ii  libxau6                   1:1.0.8-1
ii  libxdmcp6                 1:1.1.2-1.1
ii  libxfont2                 1:2.0.1-3
ii  libxshmfence1             1.2-1
ii  xserver-common            2:1.19.3-2

Versions of packages xvfb recommends:
ii  xauth  1:1.0.9-1

xvfb suggests no packages.

-- no debconf information