Merge tag 'v5.2.16' into v5.2/standard/base

This is the 5.2.16 stable release

# gpg: Signature made Thu 19 Sep 2019 03:11:09 AM EDT
# gpg:                using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
# gpg: Can't check signature: No public key