Obviously I am missed something, but why the way a path is generating
using named routes is a little bit different from using regular url_for?
Parameters from current request did not affect named routes, the way
it is in the url_for.
only_path=>false by default in named routes. It is true by default
whe using *_path instead of *_url, by why not to set it true by default
in *_url and get rid of two practically identical methods?