Author: Damyon Wiese
MDL-43151 Assign: More validation in mod_form.
Add check to mod_form to prevent "reopen until pass" and "blind marking" both being on
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3b775a0b8a9e1c5c767076b2f57e865f55734528
http://github.com/moodle/moodle/commit/3b775a0b8a9e1c5c767076b2f57e865f55734528
+ 2.8 en [reopenuntilpassincompatiblewithblindmarking,mod_assign]