Reverse Deuce's rev 1.86 change to create a separate contex for each JS module

executed via exec_bin() - this had the side-effect of causing background loaded
threads to terminate when the script terminated (rather than when the node
context was destroyed) and also caused the node context to be unused
(for mcmlxxix).

src/sbbs3/exec.cpp

@@ -575,7 +575,6 @@ static const char* js_ext(const char* fname)
 
 long sbbs_t::js_execfile(const char *cmd, const char* startup_dir)
 {
-	ulong		stack_frame;
 	char*		p;
 	char*		args=NULL;
 	char*		fname;
@@ -586,21 +585,11 @@ long sbbs_t::js_execfile(const char *cmd, const char* startup_dir)
 	JSScript*	js_script=NULL;
 	jsval		rval;
 	int32		result=0;
-	JSRuntime	*old_runtime=js_runtime;
-	JSContext	*old_context=js_cx;
-	JSObject	*old_glob=js_glob;
-	js_branch_t	old_branch;
-
-	memcpy(&old_branch, &js_branch, sizeof(old_branch));
-
-	js_init(&stack_frame);
-	js_create_user_objects();
 
 	if(js_cx==NULL) {
 		errormsg(WHERE,ERR_CHK,"JavaScript support",0);
 		errormsg(WHERE,ERR_EXEC,cmd,0);
-		result=-1;
-		goto reset_js;
+		return -1;
 	}
 
 	SAFECOPY(cmdline,cmd);
@@ -625,8 +614,7 @@ long sbbs_t::js_execfile(const char *cmd, const char* startup_dir)
 
 	if(!fexistcase(path)) {
 		errormsg(WHERE,ERR_OPEN,path,O_RDONLY);
-		result=-1;
-		goto reset_js;
+		return -1;
 	}
 
 	JS_BEGINREQUEST(js_cx);
@@ -670,8 +658,7 @@ long sbbs_t::js_execfile(const char *cmd, const char* startup_dir)
 		JS_ReportPendingException(js_cx);	/* Added Feb-2-2006, rswindell */
 		JS_ENDREQUEST(js_cx);
 		errormsg(WHERE,"compiling",path,0);
-		result=-1;
-		goto reset_js;
+		return -1;
 	}
 
 	js_branch.counter=0;	// Reset loop counter
@@ -701,14 +688,6 @@ long sbbs_t::js_execfile(const char *cmd, const char* startup_dir)
 
 	JS_ENDREQUEST(js_cx);
 
-reset_js:
-	js_cleanup(client_name);
-	js_runtime=old_runtime;
-	js_cx=old_context;
-	js_glob=old_glob;
-
-	memcpy(&js_branch, &old_branch, sizeof(old_branch));
-
 	return(result);
 }
 #endif