switch blob protocol to pwblob:

app/lib/blobs.js

@@ -159,7 +159,7 @@ module.exports = function (sbot, config) {
 }
 
 // blob url parser
-var re = /^blob:&([a-z0-9\+\/=]+\.(?:sha256|blake2s))\??(.*)$/i
+var re = /^pwblob:&([a-z0-9\+\/=]+\.(?:sha256|blake2s))\??(.*)$/i
 var url_parse =
 module.exports.url_parse = function (str) {
   var parts = re.exec(str)