Reduce log level in webfinger search

warning only if a person wasn't found

closes #76
8 jobs for sentry in 7 minutes and 43 seconds (queued for 2 minutes and 9 seconds)
latest
Status Job ID Name Coverage
  Test
passed #1026
linux:test

00:06:03

 
  Build
passed #1027
linux:amd64

00:01:40

 
  External
passed Federation Suite

00:07:03

failed Federation Suite

00:23:08

failed Federation Suite

00:19:08

failed Federation Suite

00:19:08

failed Federation Suite

00:05:02

failed Federation Suite