Merge branch 'gv/mingw-p4-mapuser'

"git p4" did not work well with multiple git-p4.mapUser entries on
Windows.

* gv/mingw-p4-mapuser:
  git-p4: fix git-p4.mapUser on Windows

git-p4.py

@@ -674,7 +674,7 @@ def gitConfigInt(key):
 def gitConfigList(key):
     if not _gitConfig.has_key(key):
         s = read_pipe(["git", "config", "--get-all", key], ignore_error=True)
-        _gitConfig[key] = s.strip().split(os.linesep)
+        _gitConfig[key] = s.strip().splitlines()
         if _gitConfig[key] == ['']:
             _gitConfig[key] = []
     return _gitConfig[key]