Clarifies supported systems

doc/quick-install.md

 # Jitsi Meet quick install
 
-This document describes the required steps for a quick Jitsi Meet installation on a Debian based GNU/Linux system.
+This document describes the required steps for a quick Jitsi Meet installation on a Debian based GNU/Linux system. Debian 8 (Jessie) or later, and Ubuntu 14.04 or later are supported out-of-the-box.
 
-Note: Some of the components of Jitsi-Meet will not run out-of-the-box on Debian Wheezy systems because of its libc version being too old. [See here](http://lists.jitsi.org/pipermail/users/2015-September/010064.html) for a possible solution.
+Debian Wheezy and other older systems may require additional things to be done. Specifically for Wheezy, [libc needs to be updated](http://lists.jitsi.org/pipermail/users/2015-September/010064.html).
 
 N.B.: All commands are supposed to be run by root. If you are logged in as a regular user with sudo rights, please prepend ___sudo___ to each of the commands.