patch 8.0.0123

Problem:    Modern Sun compilers define "__sun" instead of "sun".
Solution:   Use __sun. (closes #1296)

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    123,
 /**/
     122,
 /**/