MDL-17849 sql queries not printed by default during upgrade anymore, there is a new config.php only setting $CFG->upgradeshowsql instead

MDL-16483 reverting changes done to admin/index.php, adding new /admin/report/unittest/test_tables script.php (not finished yet!)

there are now only two upgrade pages, one for core, the second for all plugins

MDL-17848 oops, yet more cron compatibility fixes for console_write() ;-) I have added a new console_write_error() too

MDL-16483 $CFG->unittestprefix not required anymore to run unit tests that do not need fake db; it should be saer to let admins modify the prefix in config.php instead of modifying it from php

MDL-16483 - renamed MoodleUnitTestCase to FakeDBUnitTestCase; MDL-17841 removed bogus remove lib/simpletest/slowcodetest.php

MDL-14123 Full IPv6 support - replaced mnet ip_in_range() by standard ipv6 compatible address_in_subnet(); replaced $_SERVER['REMOTE_ADDR'] with standard getremoteaddr()

accesslib: MDL-17626 delete the context whenever a block is deleted. This includes a new helper function blocks_delete_all_on_page.