patch 7.4.1804

Problem:    Can't use Vim as MANPAGER.
Solution:   Add manpager.vim. (Enno Nagel, closes #491)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1804,
 /**/
     1803,
 /**/