Remove hyper

[pyfisch]

Closes #15

[tailhook]

Well, most things are okay there, but I'm don't like 37cf865 too much. Some things there are deliberate, not just mistakes. I'm going to apply that in patch mode, picking things one by one.

Was all of that suggested by clippy, or you just grouped a bunch of non-significant changes together?

[pyfisch]

Almost all changes in 37cf865 where suggested by clippy. The only thing I changed myself was eq_ignore_ascii_case. Are there specific code constructs you do not like in rotor-http? If so I will avoid them in my own future code.

[tailhook]

Okay, I don't like implicit return. It's okay in one-liners, and when there is Ok(), but bare 'true' at the end of function look ugly.

Other things I've rolled back are specific to the code:

• header checking, it's structured as nested ifs intentionally (header -- outer, value -- inner)
• structure matching in done_headers uses _ on fields and not .. to make code more explicit