patch 9.1.0023: xxd: few problems with EBCDIC for z/OS (MVS)

Problem:  xxd: few problems with EBCDIC for z/OS (MVS)
Solution: Fix xxd build and support ASCII and UTF-8 on z/OS (MVS)
          natively, add MVS guard checks with __CHARSET_LIB,
          support $LIBS in the Makefile
          (Igor Todorovski)

related: #13821

Signed-off-by: Igor Todorovski <itodorov@ca.ibm.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 562ba13..0099da5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    23,
+/**/
     22,
 /**/
     21,