Support path params

[ldrozdz]

Support specifying path parameters (e.g. userId, streamId etc.) via command line and JCurl.Builder.

To be decided:

• command line parameter name (suggestion: -p -path)
• command line URL placeholder syntax (suggestion: :name)

Example:

jcurl -p uid 1234 https://acme.com/user/:uid/info -> resolved to https://acme.com/user/1234/info