[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-20190309


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

Changes for Build #568
[Dan Smith <dsmith at danplanet.com>] Move http_user_agent to chirp_common and fix a stupid bug

This needs to be somewhere other than __init__.py because we overwrite that as
part of the win32 build, so just put it in chirp_common.

Related to #6563

[DanClemmensen <DanClemmensen at gmail.com>] [ft4] correct frequency scale factor for FT-65 [#6577]

[Dan Smith <dsmith at danplanet.com>] Set the urllib user-agent string to something chirp-specific

Yes, this is the crazy way you have to do this for the OG urllib, but it
works in our favor here to just make sure everything is using the right thing.
Obviously we need to move this code to requests at some point, but since
repeaterbook just broke us with the cloudflare change, this is a point fix
for a current issue.

Fixes #6563