Upgrade to Logback 1.2.1

= February 9th, 2017, Release of version 1.2.1

To ensure backward compatibility of configuration files, the immediateFlush property set for a LayoutWrappingEncoder is propagated to the enclosing OutputStreamAppender.

= February 8th, 2017, Release of version 1.2.0

Encoder interface has changed and is no longer expected to handle an OutputStream.

Encoder interface has changed and is no longer expected to handle an OutputStream. This simplification allows finer-grain locking resulting in significantly improved performance.

Release 1.2.0 fixes a rather severe serialization vulnerability in SocketServer and ServerSocketReceiver. Users running these components should upgrade immediately.

This release fixes a rather severe serialization vulnerability in SocketServer and ServerSocketReceiver. Users running these components should upgrade immediately.

In TimeBasedRollingPolicy, fixed issue with totalSizeCap of more than 2^31. This problem was reported in 1231 by Simon Teng.

Logback-classic now searches for the file logback-test.xml first, logback.groovy second and logback.xml third. In previous versions logback.groovy was looked up first which was non-sensical in presense of logback-test.xml. This fixes LOGBACK-1245 reported by Joern Huxhorn.