updated for version 7.3.253

Problem:    "echo 'abc' > ''" returns 0 or 1, depending on 'ignorecase'.
            Checks in mb_strnicmp() for illegal and truncated bytes are
            wrong.  Should not assume that byte length is equal before case
            folding.
Solution:   Add utf_safe_read_char_adv() and utf_strnicmp(). Add a test for
            this. (Ivan Krasilnikov)

src/version.c

@@ -709,6 +709,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    253,
 /**/
     252,
 /**/