[maven-release-plugin]  copy for tag apache-log4php-2.3.0

git-svn-id: https://svn.apache.org/repos/asf/logging/log4php/tags/apache-log4php-2.3.0@1395587 13f79535-47bb-0310-9956-ffa450edef68
If email appender has HtmlLayout, set the correct headers for mail php function
Merge branch 'master' of github.com:hal9087/logging-log4php