Author: Laurent David
MDL-74545 mod_bigbluebuttonbn: Allow changing the polling value
* The polling time on the BBB room page can be changed via the poll_interval
settings (general settings)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1077d473c49811ede026e83fbab43b26ce915665
http://github.com/moodle/moodle/commit/1077d473c49811ede026e83fbab43b26ce915665
+ 4.1 en [config_poll_interval,mod_bigbluebuttonbn]
+ 4.1 en [config_poll_interval_description,mod_bigbluebuttonbn]