patch 7.4.892

Problem:    On MS-Windows the iconv DLL may have a different name.
Solution:   Also try libiconv2.dll and libiconv-2.dll. (Yasuhiro Matsumoto)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    892,
 /**/
     891,
 /**/