Windows standards dictate drive letters are in upper case, so let's make svn_path_canonicalize do the same. Our test suite expects the same as it does case sensitive compares on normalized paths.
Suggested by: rhuijben
* subversion/libsvn_subr/path.c (svn_path_canonicalize): Change drive letter to upper case instead of lower. * subversion/tests/libsvn_subr/path-test.c (test_canonicalize, test_is_canonical): Update the 'drive letter' test cases.