Add opt-in catch all route support in the router

[jeevatkm]

The goal is to add opt-in catch all route support in the router per domain.

• One catch all route per domain is allowed.

• Catch all is opt-in feature, disabled by default.

• If Catch all is not defined, existing flow applies i.e. 404 route not found

• [x] Implementation

  • aah user have to define section catch_all { ... } at domain level config in routes.conf
  • All the route configuration attributes are supported. If path and method value provided in the catch-all section then its ignored, since that value is defaults to *

• [x] Documentation

[jeevatkm]

Done