fix cmd line interface

[JJ-Author]

• add missing cmd params for host and port. note that it must be possible to define multiple hosts sucht that time machine can listen on multiple hosts/interfaces .default hosts are 0.0.0.0 and :: and port is 8898
• configure such that default value for every paremeter is shown
• add choices programmatically from enum as shown in the PR comment
• logging parameter has no effect -> needs fixing
• clean up and improve help strings
• think about generic parameter -pp that passes through proxypy "native" arguments that are passed furhter to proxypy main function #112

[kuefmz]

#104

[kuefmz]

kuefmz@1185db6