Install Pidgin 2.10.9+ in our Wheezy branch
Originally created by @intrigeri on #6645 (Redmine)
Pidgin 2.10.8 and later fixes various security issues. Once this is available in wheezy-security, we must drop our APT pinning on feature/wheezy that installs Pidgin 2.10.7 from wheezy-backports, and have that backport removed from the Debian archive as deprecated.
Parent Task: #6015 (closed)