Send status 201 on create
Increase loglevel in API tests
Sync embedded yahttp copy

cmouse/yahttp@e8b4f1493e7c6a659102878c9b02fa7f1701464b

Including automake integration from @cmouse.
Webserver: convert to new yahttp api and router
Merge pull request #1486 from zeha/f/api-201

API: Send status 201 on create
Merge pull request #1465 from zeha/update-yahttp

Update yahttp