patch 7.4.920

Problem:    The rubydll option is not in the options window.
Solution:   Add the rubydll option.

Author: brammool

runtime/optwin.vim

@@ -1323,6 +1323,10 @@ if exists("&pythonthreedll")
   call append("$", "pythonthreedll\tname of the Python 3 dynamic library")
   call <SID>OptionG("pythonthreedll", &pythonthreedll)
 endif
+if exists("&rubydll")
+  call append("$", "rubydll\tname of the Ruby dynamic library")
+  call <SID>OptionG("rubydll", &rubydll)
+endif
 
 set cpo&vim
 

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    920,
 /**/
     919,
 /**/