Split h:u:a in 2 modules

[Skarsnik]

Maybe it could be useful to move all the HTTP class to another module to make them usable to other http modules related, probably improving their qualities over time.

[jonathanstowe]

In the future this might be useful but for myself I think that some more work would have to be done to make this do-able.

Of course if you have any specific suggestions as to how this might be done then sure :)