Rename quickfix plugin to match the filetype set in the code.

runtime/ftplugin/qf.vim

@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language:     Vim's quickfix window
+" Maintainer:   Lech Lorens <Lech.Lorens@gmail.com>
+" Last Changed: 22 Jul 2010
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Don't load another plugin for this buffer
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl stl<"
+
+" Display the command that produced the list in the quickfix window:
+setlocal stl=%q%{exists('w:quickfix_title')?\ '\ '.w:quickfix_title\ :\ ''}