Maven discovery canonicalized mvn on PATH and each Maven home to resolve symlinks (Homebrew's
bin/mvn). On Windows, a home on a mapped network drive or a subst drive then became
\\?\UNC\server\share\… (or another drive), the Maven home setting picked from the list stored
that path, and cmd.exe can't start mvn.cmd from it: every Maven run failed with "The system
cannot find the path specified". Discovery now keeps the path as found when canonicalizing would
change its drive letter.
Refs #822
l0ng-ai
3c6a245d2c