[WIP] Fix bug with domcrawler

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | not yet
| Fixed tickets | #12143 
| License       | MIT
| Doc PR        | -
This checks, that url is valid I suppose. Maybe url has scheme, but doesn't have anything else. Not sure that current check is 100% bulletproof.