Add some logic to buffer log messages at startup that otherwise would be dropped.
Add some logic to buffer log messages at startup that otherwise would
be dropped.

This was annoying because version info was getting dropped, and we
definitely want that if customers report issues.

h2oai/h2o-2,eg-zhang/h2o-2,h2oai/h2o-2,111t8e/h2o-2,calvingit21/h2o-2,eg-zhang/h2o-2,h2oai/h2o-2,eg-zhang/h2o-2,rowhit/h2o-2,rowhit/h2o-2,100star/h2o,h2oai/h2o,vbelakov/h2o,100star/h2o,100star/h2o,calvingit21/h2o-2,111t8e/h2o-2,vbelakov/h2o,100star/h2o,rowhit/h2o-2,calvingit21/h2o-2,eg-zhang/h2o-2,elkingtonmcb/h2o-2,rowhit/h2o-2,rowhit/h2o-2,vbelakov/h2o,vbelakov/h2o,eg-zhang/h2o-2,vbelakov/h2o,h2oai/h2o,rowhit/h2o-2,calvingit21/h2o-2,eg-zhang/h2o-2,h2oai/h2o,elkingtonmcb/h2o-2,111t8e/h2o-2,h2oai/h2o-2,eg-zhang/h2o-2,calvingit21/h2o-2,h2oai/h2o,elkingtonmcb/h2o-2,eg-zhang/h2o-2,h2oai/h2o,vbelakov/h2o,calvingit21/h2o-2,h2oai/h2o-2,100star/h2o,rowhit/h2o-2,h2oai/h2o-2,h2oai/h2o,100star/h2o,h2oai/h2o,h2oai/h2o-2,h2oai/h2o-2,elkingtonmcb/h2o-2,elkingtonmcb/h2o-2,vbelakov/h2o,111t8e/h2o-2,elkingtonmcb/h2o-2,vbelakov/h2o,vbelakov/h2o,100star/h2o,calvingit21/h2o-2,h2oai/h2o,elkingtonmcb/h2o-2,100star/h2o,h2oai/h2o-2,h2oai/h2o,rowhit/h2o-2,elkingtonmcb/h2o-2,111t8e/h2o-2,eg-zhang/h2o-2,100star/h2o,111t8e/h2o-2,111t8e/h2o-2,eg-zhang/h2o-2,rowhit/h2o-2,calvingit21/h2o-2,calvingit21/h2o-2,vbelakov/h2o,h2oai/h2o,111t8e/h2o-2,h2oai/h2o-2,111t8e/h2o-2,111t8e/h2o-2,elkingtonmcb/h2o-2,rowhit/h2o-2,elkingtonmcb/h2o-2,calvingit21/h2o-2