Merge tag 'v5.4.51' into v5.4/standard/base

This is the 5.4.51 stable release

# gpg: Signature made Thu 09 Jul 2020 03:37:57 AM EDT
# gpg:                using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
# gpg: Can't check signature: No public key