Reduce JSON depth limit to 128 (#477)

- also remove tpyo from net.mk
- STACK_FRAME_UNLIMITED is not needed
- also let parser allow 0e1, 0e+1 as floats

tool/net/ljson.c

@@ -27,7 +27,7 @@
 #include "third_party/lua/ltests.h"
 #include "third_party/lua/lua.h"
 
-#define MAX_JSON_DEPTH 1024
+#define MAX_JSON_DEPTH 128
 
 struct Rc {
   int t;
@@ -99,7 +99,7 @@ static struct Rc Parse(struct lua_State *L, const char *p, const char *e) {
         break;
 
       case '0':  // zero or number
-        if (p < e && *p == '.') {
+        if (p < e && (*p == '.' || *p == 'e' || *p == 'E')) {
           goto UseDubble;
         }
         lua_pushinteger(L, 0);

tool/net/net.mk

@@ -210,9 +210,6 @@ o/$(MODE)/tool/net/demo/virtualbean.html.zip.o:					\
 			-Predbean.justine.lol					\
 			-B
 
-o/$(MODE)/tool/net/ljson.o:	\
-		-DSTACK_FRAME_UNLIMITED
-
 o/$(MODE)/tool/net/redbean-demo.com.dbg:					\
 		$(TOOL_NET_DEPS)						\
 		o/$(MODE)/tool/net/redbean.o					\