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/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 1e5915f..387232b 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -604,6 +604,7 @@
 	match()			position where a pattern matches in a string
 	matchend()		position where a pattern match ends in a string
 	matchfuzzy()		fuzzy matches a string in a list of strings
+	matchfuzzypos()		fuzzy matches a string in a list of strings
 	matchstr()		match of a pattern in a string
 	matchstrpos()		match and positions of a pattern in a string
 	matchlist()		like matchstr() and also return submatches