Developer credits
Git commits in Moodle 3.3.4 by Carson Tam
commit d02e847c3f73a62c5e4b69dcb477be4e50ecf112 Author: Carson Tam <carson.tam@ucsf.edu> Date: Tue, 28 Nov 2017 06:47:53 +0800 Tag: v3.3.4 MDL-60161 class curl in filelib: Cleaned up doc block.
commit aab559c464210a2dd171420d5c502953192c6eab Author: Carson Tam <carson.tam@ucsf.edu> Date: Thu, 28 Sep 2017 23:46:31 +0800 Tag: v3.3.4 MDL-60161 class curl in filelib: Avoid duplicate params in http header