canonicalizePath regressed on Windows between directory-1.3.7.1 and directory-1.3.8.0

[Bodigrim]

directory-1.3.7.1 works correctly on Windows:

> System.Directory.canonicalizePath "\\\\localhost"
"\\\\localhost"

But directory-1.3.8.0 does not:

> System.Directory.canonicalizePath "\\\\localhost"
"C:\\localhost"

I have not tracked the regression further. Might it be related to AFPP refactoring?.. CC @hasufell

[hasufell]

Yeah, just found the regression too. It was indeed introduced by my rewrite of fromExtendedLengthPath.

Can we communicate that this fix needs to go into the next GHC release/releases? Possibly backported.

[Rufflewind]

From #170 (comment):

Can we communicate that this fix needs to go into the next GHC release/releases? Possibly backported.

@bgamari