Author: Ankit Agarwal
MDL-55777 installation: Check libcurl version on install
http://git.moodle.org/gw?p=moodle.git;a=commit;h=20a03b8085e6bccf690c37ee5188657e5a70322a
http://github.com/moodle/moodle/commit/20a03b8085e6bccf690c37ee5188657e5a70322a
+ 3.0 en [libcurlwarning,core_admin]