Changelog for NetworkManager.

A separate changelog is no longer maintained since 2008.
See the latest version before removing it in git [1].

For the detailed project history see git [2].

For notable changes between releases see the NEWS file [3].

[1] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/blob/b25c227e078bc9e3a2e06b3f62bd2b727f50beee/ChangeLog
[2] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/commits/master
[3] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/blob/master/NEWS
