constantify render depth limit

files/helpers/const.py

@@ -55,6 +55,10 @@ ERROR_MESSAGES = {
 }
 
 LOGGEDIN_ACTIVE_TIME = 15 * 60
+RENDER_DEPTH_LIMIT = 9
+'''
+The maximum depth at which a comment tree is rendered
+'''
 
 WERKZEUG_ERROR_DESCRIPTIONS = {
 	400: "The browser (or proxy) sent a request that this server could not understand.",

files/helpers/jinja2.py

@@ -84,6 +84,7 @@ def inject_constants():
 		"COLORS":COLORS,
 		"THEMES":THEMES,
 		"PERMS":PERMS,
+		"RENDER_DEPTH_LIMIT":RENDER_DEPTH_LIMIT,
 	}