patch 7.4.1065
Problem:    Cannot use the "dll" options on MS-Windows.
Solution:   Support the options on all platforms.  Use the built-in name as
            the default, so that it's clear what Vim is looking for.
diff --git a/src/option.c b/src/option.c
index 3573211..9e7f303 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1776,10 +1776,11 @@
     {"loadplugins", "lpl",  P_BOOL|P_VI_DEF,
 			    (char_u *)&p_lpl, PV_NONE,
 			    {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
-#if defined(DYNAMIC_LUA) && !defined(WIN3264)
+#if defined(DYNAMIC_LUA)
     {"luadll",      NULL,   P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_luadll, PV_NONE,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)DYNAMIC_LUA_DLL, (char_u *)0L}
+			    SCRIPTID_INIT},
 #endif
 #ifdef FEAT_GUI_MAC
     {"macatsui",    NULL,   P_BOOL|P_VI_DEF|P_RCLR,
@@ -2016,10 +2017,11 @@
 # endif
 #endif
 				(char_u *)0L} SCRIPTID_INIT},
-#if defined(DYNAMIC_PERL) && !defined(WIN3264)
+#if defined(DYNAMIC_PERL)
     {"perldll",     NULL,   P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_perldll, PV_NONE,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)DYNAMIC_PERL_DLL, (char_u *)0L}
+			    SCRIPTID_INIT},
 #endif
     {"preserveindent", "pi", P_BOOL|P_VI_DEF|P_VIM,
 			    (char_u *)&p_pi, PV_PI,
@@ -2126,15 +2128,17 @@
 			    (char_u *)NULL, PV_NONE,
 #endif
 			    {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
-#if defined(DYNAMIC_PYTHON3) && !defined(WIN3264)
+#if defined(DYNAMIC_PYTHON3)
     {"pythonthreedll",  NULL,   P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_py3dll, PV_NONE,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)DYNAMIC_PYTHON3_DLL, (char_u *)0L}
+			    SCRIPTID_INIT},
 #endif
-#if defined(DYNAMIC_PYTHON) && !defined(WIN3264)
+#if defined(DYNAMIC_PYTHON)
     {"pythondll",   NULL,   P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_pydll, PV_NONE,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)DYNAMIC_PYTHON_DLL, (char_u *)0L}
+			    SCRIPTID_INIT},
 #endif
     {"quoteescape", "qe",   P_STRING|P_ALLOCED|P_VI_DEF,
 #ifdef FEAT_TEXTOBJ
@@ -2209,10 +2213,11 @@
 			    {(char_u *)NULL, (char_u *)0L}
 #endif
 			    SCRIPTID_INIT},
-#if defined(DYNAMIC_RUBY) && !defined(WIN3264)
+#if defined(DYNAMIC_RUBY)
     {"rubydll",     NULL,   P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_rubydll, PV_NONE,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+			    {(char_u *)DYNAMIC_RUBY_DLL, (char_u *)0L}
+			    SCRIPTID_INIT},
 #endif
     {"ruler",	    "ru",   P_BOOL|P_VI_DEF|P_VIM|P_RSTAT,
 #ifdef FEAT_CMDL_INFO