Add the blowfish encryption patch from Mohsin Ahmed.  Needs more work.
diff --git a/src/option.h b/src/option.h
index b635db1..b49c0c4 100644
--- a/src/option.h
+++ b/src/option.h
@@ -908,6 +908,7 @@
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
     , BV_CINW
 #endif
+    , BV_CM
 #ifdef FEAT_FOLDING
     , BV_CMS
 #endif