migrate secrets into the database

the infra version is bumped because the nginx's dhparams path has changed
and the sftp server key path has changed.

src/server.js

@@ -7,6 +7,7 @@ exports = module.exports = {
 
 let assert = require('assert'),
     async = require('async'),
+    blobs = require('./blobs.js'),
     cloudron = require('./cloudron.js'),
     constants = require('./constants.js'),
     database = require('./database.js'),
@@ -18,6 +19,7 @@ let assert = require('assert'),
     routes = require('./routes/index.js'),
     settings = require('./settings.js'),
     users = require('./users.js'),
+    util = require('util'),
     ws = require('ws');
 
 let gHttpServer = null;
@@ -367,6 +369,7 @@ function start(callback) {
     async.series([
         database.initialize,
         settings.initCache, // pre-load very often used settings
+        blobs.initSecrets,
         cloudron.initialize,
         gHttpServer.listen.bind(gHttpServer, constants.PORT, '127.0.0.1'),
         eventlog.add.bind(null, eventlog.ACTION_START, { userId: null, username: 'boot' }, { version: constants.VERSION })