Reading a file by passing it as first argument

[ooii]

Hi, just a matter to make it easier to use, if you can remove the "<" to open a file.
Also, if you jid file or jid then nothing happens but it hangs.

[locochris]

ie. same behaviour as many other tools eg sed - read from file (if specified) or STDIN (if not).

[PatrickWalker]

Would this be like a cmd line flag to enable file mode vs stdin mode?
Guessing handling empty stdin would be desirable?