[chirp_users] New Daily Build

[Build System]

Greetings,

A new daily build of CHIRP is available.  This includes changes made
directly to the tree yesterday, and may include additional features,
bug fixes, and/or bugs.  If you are interested in trying it, grab it
from the following location:

  http://trac.chirp.danplanet.com/chirp_daily/daily-20190411


A list of the changes included in this build (since the last daily)
follows:

Changes for Build #575
[Dan Smith <dsmith at danplanet.com>] Proxy repeaterbook queries through chirp.danplanet.com

This makes us proxy queries for repeaterbook through the chirp website,
which allows us some insulation from things like the recent User-Agent
issue when RB moved to cloudflare. It also allows us to insulate against
strict SSL policies which introduce undue complication for such a simple
interface.

Fixes #6679