Fix an issue where a shared storage path on Linux, that maps via two-way
variables to a drive root on Windows, caused problems with the path
translation system.
Windows paths that consist only of a drive letter (`F:`) cannot just be
concatenated to a relative path, as that will result in `F:path\to\file`,
which is still a relative path of sorts. This is now handled correctly,
and should result in `F:\path\to\file`.
This fixes#104237.
Simplify the variable expansion code. Instead of using a separate goroutine
and two channels, use a struct + a simple function call.
No functional changes.
Simplify the code for the two-way variables' value-to-variable replacement.
Instead of using a goroutine and two channels, use a separate struct and
call a function on that directly.
No functional changes.
