add builddate to devel

src/version.h

@@ -8,5 +8,5 @@
 #define SUBMAJOR3PROXY 0
 #define MINOR3PROXY 0
 #define SUBMINOR3PROXY 0
-#define RELEASE3PROXY "3proxy-10-devel\0"
+#define RELEASE3PROXY "3proxy-10-devel" BUILDDATE "\0"
 #define YEAR3PROXY "2020"