Shrinking uuu.cpp

[markuspg]

Hi nxpfrankli,

here is another (possibly last) slew of adjustments. This time it's mostly about shortening uuu.cpp and respective source files. They are mostly cosmetic, but change quite a bit of the code's structure. Feel encouraged to reject it if it does not fit your coding style.

Thank you for offering "real" problems to work on. Most of the changes grew out of wanting to make debugging and navigating the code (which I had to do at my paid work) easier and helping myself to wrap my head around it. Your issues sound interesting, but at least during my work weeks I don't have energy and time left doing some "real" changes. Maybe if I'm bored during holidays ;-)

Did you ponder using a library like Boost.Beast for HTTP instead writing the code yourself?

Kind regards, markuspg

[nxpfrankli]

Boost is too fat.
We don't want to add much dependence on this project.

[nxpfrankli]

Please fix build error