dcs-rs-deploy: make dcs-web listen on the private IP address

This is necessary so that the monitoring can access dcs-web’s /varz
endpoint from within the Rackspace data center.
dcs-rs-deploy: update int-dcs-web DNS record for monitoring
gofmt dcs-rs-deploy
add varz-to-influxdb for monitoring

This is a small program running on our monitoring VM which will
periodically scrape the /varz endpoints of e.g. dcs-web and insert
timeseries into InfluxDB.
dcs-web: properly log search queries
dcs-web: add /goroutinez endpoint for debugging goroutine leaks
Bugfix: fix goroutine leak
dcs-rs-deploy: http.debian.net mirrors do not all support rsync

…so don’t try to sync any extra files, we don’t use them anyway.
Adding filter for git specific files

Change-Id: Ieecabcae439b9e08166bb416bd77789fb9dda3e5
Add command-line option for setting temporary folder for index files

Change-Id: Ib4390e63a49c3623afd9d2b943bf27a4d4611d1c
Adding conditional compilation option to disable the ranking database.

Change-Id: I81371ca13710c687dc0ed48e5f8d0cc99ccb7b00