Modifies the url of messages containing an address with the %40 string.

[baraganx]

I sent this address from the movim client to a friend using the xabber web client:
https://mov.im/?blog/yannv%40conversations.im/be029218-ba98-43d6-a3fc-dd58cd295480

When he received it and wanted to open the link, he had been transformed into :
https://mov.im/?blog/yannv%2540conversations.im/be029218-ba98-43d6-a3fc-dd58cd295480 (not in appearance, but the link opens the browser at this address)

which prevented him from accessing the content.
The client apparently added "25" between "%" and "40".