Bug#821125: Update to latest upstream version 3.20.1

[Michael Biebl]

Source: vinagre
Version: 3.18.2-1
Severity: wishlist

Filing this bug so we can track the process of updating vinagre to 3.20.
Atm this is blocked by [1] and we run into compilation errors [2].

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=814676
[2] https://bugzilla.gnome.org/show_bug.cgi?id=765119

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

-- no debconf information