Merge branch 'release-2.1.10-stable-pull' into patches-2.1

* release-2.1.10-stable-pull:
  Bump version to 2.1.10-stable everywhere
  Bump ChangeLog
  Bump AUTHORS section
  ...

Tested on (cmake/autotools):
- ubuntu
- freebsd
- osx
- windows
- netbsd
- solaris
- centos