[logback-dev] [qos-ch/logback] 1212b1: revert to javadoc plugin 2.9.1

[Ceki Gulcu]

  Branch: refs/heads/master
  Home:   https://github.com/qos-ch/logback
  Commit: 1212b111cdc00591c2ba1f46f38a1fa40fef9b52
      https://github.com/qos-ch/logback/commit/1212b111cdc00591c2ba1f46f38a1fa40fef9b52
  Author: Ceki Gulcu <ceki at qos.ch>
  Date:   2015-03-24 (Tue, 24 Mar 2015)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  revert to javadoc plugin 2.9.1

with the latest version the release process fails