CPU autoconfig

fix amd stagger detection

disable prefetch by default

add psychocrypt to cmd output

- allow to disable prefetch on systems without hardware aes
- set default disable memory prefetch

speedup systems without huge memory pages

allow optional static linking

Increase the performance for systems without huge memory pages to the performance with huge pages.
Use 2 MiB alignment for memory allocations.

- add cmake option `CMAKE_LINK_STATIC`
- add missing `CMAKE_C_FLAGS`
- change documentation

extend `README.txt`

Topic feature complete build

add overview about advanced compile options

- throw an error if a compile dependancy is not fullfilled
- add options to disable hard compile dependancies

refactor CMake

- allow compiling without microhttpd
- allow compiling without OpenSSL
- install `config.txt` with command `make install`

Simplified expression