Git commits in Moodle 3.5.0 by Carson Tam

commit 7d4a3d1d07f861109c510124ace53c992fd6a439
Author: Carson Tam <carson.tam@ucsf.edu>
Date:   Tue, 28 Nov 2017 06:47:53 +0800
Tag:    v3.5.0-beta

MDL-60161 class curl in filelib: Cleaned up doc block.


commit a2b66c7833aafac915a06e791cd19d0c9966baa9
Author: Carson Tam <carson.tam@ucsf.edu>
Date:   Thu, 28 Sep 2017 23:46:31 +0800
Tag:    v3.5.0-beta

MDL-60161 class curl in filelib: Avoid duplicate params in http header