Don't store our own keys in the database

serverkeyapi/internal/api.go

@@ -147,13 +147,17 @@ func (s *ServerKeyAPI) FetchKeys(
 					if res.ValidUntilTS > prev.ValidUntilTS {
 						// This key is newer than the one we had so let's store
 						// it in the database.
+						if req.ServerName != s.Cfg.Matrix.ServerName {
 							storeResults[req] = res
 						}
+					}
 				} else {
 					// We didn't already have a previous entry for this request
 					// so store it in the database anyway for now.
+					if req.ServerName != s.Cfg.Matrix.ServerName {
 						storeResults[req] = res
 					}
+				}
 				// Update the results map with this new result. If nothing
 				// else, we can try verifying against this key.
 				results[req] = res