handle specific check for case agent-target address is url

[lucamrgs]

Supersedes #104
Technically, one could specify a URL address for an agent/target, and then a path in the http-api command that "starts from" the agent-target URL address. This could still generate a valid command.

In this PR I thus simply added a warning that advises if the URL address has a path stemming from the domain name, and if that path is different from the path specified in the command.

[MaartendeKruijf]

Expected behaviour should be: if target address type is url it should append the command path to the url eg. (https://godcapability.example.com/ + command /users = https://godcapability.example.com/users). Also give a warning but continue execution if path in the command is the same as in the url (https://godcapability.example.com/users + command /users = https://godcapability.example.com/users/users)

[lucamrgs]

@MaartendeKruijf should we test that the warning is logged or is it fine like this