Merge branch 'bep:master' into master

Add 'dotallowlist' to .s3deploy.yml config file

Example addition to config file:

```yaml
dotallowlist:
  - .well-known
```

Warning: I don't know Golang.  This code appears to work, but may not be
idiomatic Golang.

release: Remove the 386 build

For now.

circleci: Update to Go 1.14.3

go mod tidy

Add Prefix param to ListObjectsPages

Unexport pathEscapeRFC1738

S3: Add Public ACL flag - default to private.

Release v2.2.0

Release v2.1.0