MDL-30968 mod_forum: No picture link to group when no groups mode
MDL-48174 core_lang: support for ->skiplangupgrade in lang cron task

Similar to upgrade_language_pack(), update_langpacks_task should
respect skiplangupgrade config. Also, this should be added to behat
whitelist, so it can be disabled during on-sync period, when lang
pack for master is not available.
MDL-48174 tool_langimport: info about skipped update

So admins can work out why the task might not be having an effect.
weekly release 2.8+
MDL-48204 mod_wiki: admin.php - fix syntax error
MDL-48214 Merge English strings from the en_fix language pack
Merge branch 'MDL-48214-28-enfix' of git://github.com/mudrd8mz/moodle into MOODLE_28_STABLE
Moodle release 2.8.1
MDL-43987 core: Remove port numbers in cleanremoteaddr