patch 8.2.1726: fuzzy matching only works on strings

Problem:    Fuzzy matching only works on strings.
Solution:   Support passing a dict.  Add matchfuzzypos() to also get the match
            positions. (Yegappan Lakshmanan, closes #6947)
diff --git a/src/evalfunc.c b/src/evalfunc.c
index f96a4c4..de723aa 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -753,7 +753,8 @@
     {"matcharg",	1, 1, FEARG_1,	  ret_list_string, f_matcharg},
     {"matchdelete",	1, 2, FEARG_1,	  ret_number,	f_matchdelete},
     {"matchend",	2, 4, FEARG_1,	  ret_number,	f_matchend},
-    {"matchfuzzy",	2, 2, FEARG_1,	  ret_list_string,	f_matchfuzzy},
+    {"matchfuzzy",	2, 3, FEARG_1,	  ret_list_string,	f_matchfuzzy},
+    {"matchfuzzypos",	2, 3, FEARG_1,	  ret_list_any,	f_matchfuzzypos},
     {"matchlist",	2, 4, FEARG_1,	  ret_list_string, f_matchlist},
     {"matchstr",	2, 4, FEARG_1,	  ret_string,	f_matchstr},
     {"matchstrpos",	2, 4, FEARG_1,	  ret_list_any,	f_matchstrpos},