patch 8.2.4463: completion only uses strict matching

Problem:    Completion only uses strict matching.
Solution:   Add the "fuzzy" item for 'wildoptions'. (Yegappan Lakshmanan,
            closes #9803)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 3f77562..c8b40ec 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -9087,6 +9087,14 @@
 			feature}
 	A list of words that change how |cmdline-completion| is done.
 	The following values are supported:
+	  fuzzy		Use fuzzy matching to find completion matches. When
+			this value is specified, wildcard expansion will not
+			be used for completion.  The matches will be sorted by
+			the "best match" rather than alphabetically sorted.
+			This will find more matches than the wildcard
+			expansion. Currently fuzzy matching based completion
+			is not supported for file and directory names and
+			instead wildcard expansion is used.
 	  pum		Display the completion matches using the popupmenu
 			in the same style as the |ins-completion-menu|.
 	  tagfile	When using CTRL-D to list matching tags, the kind of