Remove expired ports:
2016-08-23 www/mediawiki124: EOL upstream
2016-08-23 sysutils/rsyslog7: Upgrade to rsyslog 8
2016-08-24 www/moodle28: EOL upstream
2016-08-31 devel/php5-msgpack: This is an older version of the software, please use devel/pecl-msgpack.
2016-09-02 textproc/asciinema: use textproc/py3-asciinema instead
2016-09-09 x11-toolkits/qtada: No development since 2012, usefulness unclear