Comment 6 for bug 1300367

Attached is a patch which seems to fix the bug for Ubuntu Trusty or 14.04.

Please test the package from my PPA and confirm it works OK.
https://launchpad.net/~cp/+archive/ubuntu/bug-fixes/+packages

The easy way to install it:
sudo add-apt-repository ppa:cp/bug-fixes
sudo apt-get update
sudo apt-get upgrade

Changelog

rsync (3.1.0-2ubuntu0.2) trusty; urgency=medium

  * Use included zlib as transfers failed when using -z with the separate zlib.
    (LP: #11300367)
    - debian/rules: Add -Izlib to CPPFLAGS and change .configure to use
      -with-included-zlib=yes
    - debian/control: Remove Build-Depends zlib1g-dev

My testing shows transfers with the -z option are working, but the real test will be when my backups run late tonight. ;)