Fix path for current directory in eshell on MS-Windows

On MS-Windows, PATH implicitly includes the current directory.
Do it right for Eshell by adding "./" instead of ".", to
avoid finding .FOO instead of ./FOO.
* lisp/eshell/esh-util.el (eshell-get-path): New function.
* lisp/eshell/em-cmpl.el (eshell-complete-commands-list):
* lisp/eshell/esh-ext.el (eshell-search-path): Use eshell-get-path.

Author: ber-ro

lisp/eshell/em-cmpl.el

@@ -409,13 +409,11 @@ to writing a completion function."
 	  (setq filename (substring filename 1)
 		pcomplete-stub filename
 		glob-name t))
-      (let* ((paths (eshell-parse-colon-path eshell-path-env))
+      (let* ((paths (eshell-get-path))
 	     (cwd (file-name-as-directory
 		   (expand-file-name default-directory)))
 	     (path "") (comps-in-path ())
 	     (file "") (filepath "") (completions ()))
-        (if (eshell-under-windows-p)
-            (push "." paths))
 	;; Go thru each path in the search path, finding completions.
 	(while paths
 	  (setq path (file-name-as-directory

lisp/eshell/esh-ext.el

@@ -74,10 +74,8 @@ but Eshell will be able to understand
   "Search the environment path for NAME."
   (if (file-name-absolute-p name)
       name
-    (let ((list (eshell-parse-colon-path eshell-path-env))
+    (let ((list (eshell-get-path))
 	  suffixes n1 n2 file)
-      (if (eshell-under-windows-p)
-          (push "." list))
       (while list
 	(setq n1 (concat (car list) name))
 	(setq suffixes eshell-binary-suffixes)

lisp/eshell/esh-util.el

@@ -232,6 +232,14 @@ It might be different from \(getenv \"PATH\"), when
 `default-directory' points to a remote host.")
 (make-variable-buffer-local 'eshell-path-env)
 
+(defun eshell-get-path ()
+  "Return $PATH as list.
+Add the current directory on windows."
+  (eshell-parse-colon-path
+   (if (eshell-under-windows-p)
+       (concat "." path-separator eshell-path-env)
+     eshell-path-env)))
+
 (defun eshell-parse-colon-path (path-env)
   "Split string with `parse-colon-path'.
 Prepend remote identification of `default-directory', if any."