patch 9.1.0503: cannot use fuzzy keyword completion

Problem:  cannot use fuzzy keyword completion
          (Maxim Kim)
Solution: add the "fuzzycollect" value for the 'completeopt'
          setting, to gather matches using fuzzy logic (glepnir)

fixes: #14912
closes: #14976

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/optionstr.c b/src/optionstr.c
index d722981..170d48e 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -118,7 +118,7 @@
 				NULL};
 static char *(p_fcl_values[]) = {"all", NULL};
 #endif
-static char *(p_cot_values[]) = {"menu", "menuone", "longest", "preview", "popup", "popuphidden", "noinsert", "noselect", "fuzzy", NULL};
+static char *(p_cot_values[]) = {"menu", "menuone", "longest", "preview", "popup", "popuphidden", "noinsert", "noselect", "fuzzy", "fuzzycollect", NULL};
 #ifdef BACKSLASH_IN_FILENAME
 static char *(p_csl_values[]) = {"slash", "backslash", NULL};
 #endif