Meet 1.4.0

[Denchick]

Good news everyone!

It's been a while since the last SPQR release. We're proud to announce that we've made a lot of improvements. Here's a quick overview of what's new:

• We've added support for Kerberos and LDAP authentication, many thanks to @greenlight and @NitroLine!
• The extended protocol is ready to use by @reshke
• The first iteration of data balancing is ready, you can try it out. You can find the code here or check out the documentation. Many thanks to @EinKrebs and @munakoiso!
• And there are lots of other improvements and fixes. The full list of changes can be found in the release notes.

By the way, On June 24-25, St. Petersburg will host the Saint Highload++ conference for developers of high-load systems. @Denchick will talk about how data (auto)balancing works in detail.

Stay tuned!