vim-patch:8.2.0869: it is not possible to customize the quickfix window contents

Problem:    It is not possible to customize the quickfix window contents.
Solution:   Add 'quickfixtextfunc'. (Yegappan Lakshmanan, closes vim/vim#5465)
858ba06d5f

src/nvim/options.lua

@@ -2073,6 +2073,14 @@ return {
       varname='p_pyx',
       defaults={if_true={vi=0}}
     },
+    {
+      full_name='quickfixtextfunc', abbreviation='qftf',
+      short_desc=N_("customize the quickfix window"),
+      type='string', scope={'global'},
+      vi_def=true,
+      varname='p_qftf',
+      defaults={if_true={vi=""}}
+    },
     {
       full_name='quoteescape', abbreviation='qe',
       short_desc=N_("escape characters used in a string"),