Bug#792287: ffms2: please make pandoc optional

[Thorsten Glaser]

Source: ffms2
Version: 2.21-2
Severity: normal

Hi,

pandoc is, unfortunately, not available on all Debian
architectures due to its use of Haskell. Please make
pandoc optional.

-- System Information:
Debian Release: stretch/sid
  APT prefers unreleased
  APT policy: (500, 'unreleased'), (500, 'buildd-unstable'), (500, 'unstable')
Architecture: x32 (x86_64)
Foreign Architectures: i386, amd64

Kernel: Linux 4.0.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)