Pull src tar and apply patches
Disable Apache HTTP's stale check

* Apache HTTP's stale conn check causes additionall latency and
  is not recommended for high-throughput/low-latency scenarios.

* Disabling the stale check requires adding a periodic background
  task which clears idles connections.  This prevents the client
  from pulling a conn closed by the server which causes an IOException.

* Disable nagle as it's meant for protocols that use many small messages.
Change Solr logging level to WARNING

Solr is very verbose at the INFO level, causing extra disk IO for no
benefit.  The logging levels can be changed dynamically if that
information is needed.
Merge remote-tracking branch 'origin/better-dist-search-2'