patch 7.4.1154
Problem:    No support for JSON.
Solution:   Add jsonencode() and jsondecode().  Also add v:false, v:true,
            v:null and v:none.
diff --git a/src/Make_bc3.mak b/src/Make_bc3.mak
index a23174f..0de7847 100644
--- a/src/Make_bc3.mak
+++ b/src/Make_bc3.mak
@@ -72,6 +72,7 @@
 	getchar.obj \
 	hardcopy.obj \
 	hashtab.obj \
+	json.obj \
 	main.obj \
 	mark.obj \
 	memfile.obj \