patch 8.0.0248: vim_strcat() cannot handle overlapping arguments

Problem:    vim_strcat() cannot handle overlapping arguments.
Solution:   Use mch_memmove() instead of strcpy(). (Justin M Keyes,
            closes #1415)

Author: brammool

src/misc2.c

@@ -1719,7 +1719,7 @@ vim_strncpy(char_u *to, char_u *from, size_t len)
 
 /*
  * Like strcat(), but make sure the result fits in "tosize" bytes and is
- * always NUL terminated.
+ * always NUL terminated. "from" and "to" may overlap.
  */
     void
 vim_strcat(char_u *to, char_u *from, size_t tosize)
@@ -1733,7 +1733,7 @@ vim_strcat(char_u *to, char_u *from, size_t tosize)
 	to[tosize - 1] = NUL;
     }
     else
-	STRCPY(to + tolen, from);
+	mch_memmove(to + tolen, from, fromlen + 1);
 }
 
 /*

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    248,
 /**/
     247,
 /**/