Author: Jay Jayswal
MDL-52158 auth: Improve recaptcha settings and help
http://git.moodle.org/gw?p=moodle.git;a=commit;h=95e68d8982bc8146f05f65be09ff4b9514207d5d
http://github.com/moodle/moodle/commit/95e68d8982bc8146f05f65be09ff4b9514207d5d
+ 3.0 en [configrecaptchaprivatekey,core_admin]
+ 3.0 en [configrecaptchapublickey,core_admin]
+ 3.0 en [recaptchaprivatekey,core_admin]
+ 3.0 en [recaptchapublickey,core_admin]