Option for custom user agent string

[laxas]

The list of user agents can be easily edited in the source code but a command line option to specify one specific user agent string would be nice.
I use Photon on my own server and want to delete Photons requests from my log files.

[s0md3v]

Hi there,

I added it to the development queue.
You can track the progress here.

Thanks for contributing ^_^

[laxas]

Cool! Thank you very much.