[logback-dev] [qos-ch/logback] 7209b1: fix LOGBACK-1280

[Ceki Gulcu]

  Branch: refs/heads/master
  Home:   https://github.com/qos-ch/logback
  Commit: 7209b1fb3d50180af97550a82b1acf67ad196a9d
      https://github.com/qos-ch/logback/commit/7209b1fb3d50180af97550a82b1acf67ad196a9d
  Author: Ceki Gulcu <ceki at qos.ch>
  Date:   2018-01-25 (Thu, 25 Jan 2018)

  Changed paths:
    M logback-core/src/main/java/ch/qos/logback/core/ContextBase.java
    A logback-core/src/main/java/ch/qos/logback/core/property/CanonicalHostNamePropertyDefiner.java
    M logback-core/src/main/java/ch/qos/logback/core/util/ContextUtil.java
    A logback-core/src/main/java/ch/qos/logback/core/util/NetworkAddressUtil.java
    A logback-core/src/test/input/joran/define/canonicalHostname.xml
    M logback-core/src/test/java/ch/qos/logback/core/joran/action/DefinePropertyActionTest.java
    M logback-site/src/site/pages/manual/configuration.html

  Log Message:
  -----------
  fix LOGBACK-1280