Use max_doc_length rather than max_doc_size to be consistent with other services

services/docstore/app.coffee

@@ -20,7 +20,7 @@ app.get  '/project/:project_id/doc', HttpController.getAllDocs
 app.get  '/project/:project_id/doc/:doc_id', HttpController.getDoc
 app.get  '/project/:project_id/doc/:doc_id/raw', HttpController.getRawDoc
 # Add 16kb overhead for the JSON encoding
-app.post '/project/:project_id/doc/:doc_id', bodyParser.json(limit: Settings.max_doc_size + 16 * 1024), HttpController.updateDoc
+app.post '/project/:project_id/doc/:doc_id', bodyParser.json(limit: Settings.max_doc_length + 16 * 1024), HttpController.updateDoc
 app.del  '/project/:project_id/doc/:doc_id', HttpController.deleteDoc
 
 app.post  '/project/:project_id/archive', HttpController.archiveAllDocs

services/docstore/config/settings.defaults.coffee

@@ -18,4 +18,4 @@ module.exports =
 	#		secret: ""
 	#		bucket: "something"
 
-	max_doc_size: 2 * 1024 * 1024 # 2mb
+	max_doc_length: 2 * 1024 * 1024 # 2mb