patch 8.2.3250: MS-Windows: cannot build with libsodium

Problem:    MS-Windows: cannot build with libsodium.
Solution:   Change FEAT_SODIUM into HAVE_SODIUM. (Christian Brabandt,
            closes #8668, closes #8663)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 8c8e71a..18b5a88 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -395,7 +395,7 @@
 
 !if "$(SODIUM)" != "no"
 SOD_INC		= /I "$(SODIUM)\include"
-SOD_DEFS	= -DFEAT_SODIUM
+SOD_DEFS	= -DHAVE_SODIUM
 SOD_LIB		= $(SOD_LIB)\libsodium.lib
 !endif
 
diff --git a/src/version.c b/src/version.c
index 33f4196..f324f3d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3250,
+/**/
     3249,
 /**/
     3248,