Merge pull request #99 from PowerShell/joeyaiello-patch-2

Update RFC0020-DefaultFileEncoding.md

Author: SteveL-MSFT

1-Draft/RFC0020-DefaultFileEncoding.md renamed to 2-Draft-Accepted/RFC0020-DefaultFileEncoding.md

@@ -51,20 +51,16 @@ The following is the complete list of `FileSystemCmdletProviderEncoding` members
 * BigEndianUnicode
 * BigEndianUTF32
 * Byte
-* Default
-* Legacy
-* Oem
 * String
 * Unicode
-* Unknown
 * UTF32
 * UTF7
 * UTF8
 * UTF8NoBOM
 
 When `$PSDefaultEncoding` is set to `UTF8NoBOM`, the file shall be created with UTF8 encoding and no BOM shall be written.
 
-When `$PSDefaultEncoding` is set to `Legacy`, the behavior shall be:
+When `$PSDefaultEncoding` is set to `WindowsLegacy`, the behavior shall be:
 
 ```
 CmdletName          Encoding