MFH: r552582
net-im/py-matrix-synapse: Update to 1.21.2, Fix security issue
Changelog: https://github.com/matrix-org/synapse/blob/v1.21.2/CHANGES.md
PR: 249948
Submitted by: Sascha Biberhofer <ports@skyforge.at> (maintainer)
Security: 5f39d80f-107c-11eb-8b47-641c67a117d8
Approved by: ports-secteam (joneum)