patch 8.1.0894: MS-Windows: resolve() does not return a reparse point

Problem:    MS-Windows: resolve() does not return a reparse point.
Solution:   Improve resolve(). (Yasuhiro Matsumoto, closes #3896)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 0fc249c..c2150e5 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -7385,6 +7385,9 @@
 resolve({filename})					*resolve()* *E655*
 		On MS-Windows, when {filename} is a shortcut (a .lnk file),
 		returns the path the shortcut points to in a simplified form.
+		When {filename} is a symbolic link or junction point, return
+		the full path to the target. If the target of junction is
+		removed, return {filename}.
 		On Unix, repeat resolving symbolic links in all path
 		components of {filename} and return the simplified result.
 		To cope with link cycles, resolving of symbolic links is