Add switch to not use offroad about utack_brouter_profile

[utack]

Hi,

thanks for your idea.
I will have to think about it a bit before finding a good solution

For now can you test if this works for you
https://pastebin.com/pYsz3JQH

Please find a new parameter "smoothness_limit" in line 38 that you can play with for a bit, something like 0.4 as I have applied now should quite strictly only give you roads in excellent conditions
Something like 0.8 should probably also still be ok in slightly "tired" conditions, but would allow some unpaved roads

[Wizit38]

thank you so much. I will try it later.

[Wizit38]

The value worked nicely on the route I tested on. It originally routed on a dirt track but now routes along paved roads. Thank you for this

[Wizit38]

Btw, I found that 1.25 seems to be the threshold to switch back to the original profile

[Wizit38]

Based on this, I implemented the following:

switch to use paved roads only

assign paved_routes_only false

the maximum smoothness penalty a way may have before we avoid it

assign smoothness_limit = switch ( paved_routes_only ) 0.4 1.25 # Set to 0.4 to use paved roads, >1.25 to allow dirt tracks

Sorry about the bold text. Seems it bolds text after #