vim-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 vim/vim#9803)

38b85cb4d7

Use MAX_FUZZY_MATCHES in fuzzy_match_str().
Omit fuzmatch_str_free() as it is only used on allocation failure.

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/search.h

@@ -99,6 +99,14 @@ typedef struct searchstat {
   int last_maxcount;  // the max count of the last search
 } searchstat_T;
 
+/// Fuzzy matched string list item. Used for fuzzy match completion. Items are
+/// usually sorted by "score". The "idx" member is used for stable-sort.
+typedef struct {
+  int idx;
+  char *str;
+  int score;
+} fuzmatch_str_T;
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "search.h.generated.h"
 #endif