Author: Eloy Lafuente (stronk7)
MDL-51245 mssql: Diagnose missing READ_COMMITTED_SNAPSHOT mode
Without it, transactions are executed in standard READ_COMMITED
mode, without snapshoting/row versioning, leading to update conflicts
under high concurrency.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2edfa4a1f9d91a40824eea66922926b1facd511b
http://github.com/moodle/moodle/commit/2edfa4a1f9d91a40824eea66922926b1facd511b
+ 2.9 en [mssqlrcsmodemissing,core_error]