Fix bug in socket repl

[thakkarparth007]

Socket REPL has some bug that occurs quite mysteriously - and causes no response from REPL thereafter. There's also a close-of-nil-channel bug occuring somewhere in the REPL (I saw this once while going through the logs) and maybe that is the issue here. Not really sure where the close of nil channel is occurring.

Also, we need a better admin panel than this. :P
The socket repl bug needs to be fixed nevertheless, because the way that tool is designed, it can be used to provide interactive CLI over websockets, and that's kinda cool and sometimes useful.