Attempt to fix issues related to encoding of values in HTTP headers when the header contains unicode values.
Add ASCII range 32-126 to the safe range when quoting headers.
Add a space to the integration test to confirm it works as expected
Merge pull request #1864 from danielgtaylor/s3-header-encoding

Fix issues related to encoding of values in HTTP headers when using unicode. Fixes #1864, #1839, #1829, #1828, #702.