patch 7.4.920
Problem:    The rubydll option is not in the options window.
Solution:   Add the rubydll option.
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index d1e5336..048b1ad 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1323,6 +1323,10 @@
   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
 
diff --git a/src/version.c b/src/version.c
index a52dca9..eb418a7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    920,
+/**/
     919,
 /**/
     918,