refactor: recv_window to std::time::Duration + fixes of some old code #409

Job	Run time
Unused Dependencies	10s
Sorted Derives	7s
Reasonable Amount of Comments	12s
Cargo Sorted	5s
pre_ci / sed_path_dep_sources	15s
pre_ci / pre_ci	2s
Clippy	49s
Documentation	58s
	2m 38s

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