route pattern params / match struct in basic_router.cpp, e.g. "/rpc/:id/call"

[MungoG]

[sgerbino]

Implemented in the consolidated router in cppalliance/http: pattern params like /users/:id are captured into route_params::params, with the grammar in src/server/route_abnf.cpp. basic_router.cpp no longer exists in this repo.

[vinniefalco]

is there a design doc?