[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-20210307


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

Changes for Build #644
[Jim Unroe <rock.unroe at gmail.com>] [TH-UV88] Fix missing settings tab due to out-of-range value.             #8683

This patch addresses the out-of-range (or lack of) region code that seems
to be present in more recent firmware versions by...


- extending the region code list for unknown values from 5 to 15.
- logging region code values from 5 to 15 to debug.log file.

With contributions from Ruddolph Gutzerhagen.

[Rick DeWitt <aa0rd at yahoo.com>] [ts480] Bug fixes for issues #8297 and #8877 Kenwood TS-480
#8297 fix for split mode support, #8877 fix for 67Htz PL download

[Jim Unroe <rock.unroe at gmail.com>] [BF-F8HP] Fix for out-of-range TXP values in VFOs

This patch forces out-of-range TXP values to a valid value.

Fixes #8539

[Jim Unroe <rock.unroe at gmail.com>] [TK-862] Add valid_tuning_steps for Kenwood TK-862 (and others)

This patch adds valid tuning steps for the Kenwood TK-862 and the following
Kenwood radio models.

TK76x, TK-86x

fixes #8245

[Jim Unroe <rock.unroe at gmail.com>] Driver Maintenance: tk760.py

1. Add to PEP8 manifest
2. Perform PEP8 cleanup

in preperaton to address #8245

[Dan Smith <dsmith at danplanet.com>] Add OTG Radio V1 alias of KT8900

#8869