Author: Jay Jayswal
MDL-52158 auth: Improve recaptcha settings and help
http://git.moodle.org/gw?p=moodle.git;a=commit;h=67405a0d68bdd5195a1052454aaee453d26a8f2f
http://github.com/moodle/moodle/commit/67405a0d68bdd5195a1052454aaee453d26a8f2f
+ 2.9 en [configrecaptchaprivatekey,core_admin]
+ 2.9 en [configrecaptchapublickey,core_admin]
+ 2.9 en [recaptchaprivatekey,core_admin]
+ 2.9 en [recaptchapublickey,core_admin]