Merge tag 'v4.19.81' into v4.19/standard/base

This is the 4.19.81 stable release

# gpg: Signature made Tue 29 Oct 2019 04:20:10 AM EDT
# gpg:                using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
# gpg: Can't check signature: No public key