bug: When creating a route, host should not be required

[tengzhinei]

Issue description

When creating a route, host should not be required. We are a sass project. Thousands of domain names point to the same system. Now, we are using Kong. kong is not required

[membphis]

you can copy this issue to apisix-dashboard ^_^

[juzhiyuan]

cc @membphis @nic-chen so it's not needed? 🤔

[juzhiyuan]

ping @membphis @nic-chen

[LiteSun]

any update?

[membphis]

only uri is the required option. the host is optional option.

[juzhiyuan]

please modify this one when you update the Route module

[juzhiyuan]

assigned to @LiteSun