Git commits in Moodle 3.5.3 by Michelle Melton

commit 5e1b7e4d2827e33cc388e19cf4bbdbc81eeb68b9
Author: Michelle Melton <meltonml@appstate.edu>
Date:   Tue, 28 Aug 2018 03:06:48 +0800
Tag:    v3.5.3

MDL-63215 block_rss_client: Escaping tags in RSS entries