* Fix Python3 errors for device tests
The Python3 migration didn't include fixes for local scripts in the
device test tree.
Fatal build and run Python errors fixed.
The last update to xunitmerge is ~5 years ago, so it looks to be
unsupported now.
Use a local copy of the two components to allow patching to work with
Python3.
The serial test seems to send garbage chars (non-ASCII/etc.), so use a
codepage 437 which supports all 255 chars.
Fixes: #6660
* Run tests at 160MHz (req'd for some SSL connections)
* Fix debuglevel options for builder
* Fix Python3 interpreter path in xunitmerge
* Remove virtualenv on "make clean"
* Add appropriate attribution, license to xunitmerge
Add like to the original sources with the author's license to the
copied/fixed xunitmerge files.
* optionally allow redirects on http OTA updates
* Refactored HTTPClient::begin(url...) & setURL functions, now only beginInternal parses URL, sets ports
Added HTTPRedirect example.
* fix indentation for style check
* add space after while for style check
* don't use deprecated begin method in redirect example
* moved redirect handling code to HTTPClient.
only GET and HEAD requests are currently handled automatically
Redirects that fail to be automatically handled return the redirect code as before
* added support for POST/303 redirect
added device redirect tests
* add missing getLocation() implementation
* if the new location is only a path then only update the URI
* update HTTPClient API usage
skip the second POST as end() has different semantics and nulls the client pointer
use bearssl in ssl tests
add delay in python side when shutting down http web server so MacOS does not complain about address already in use
* fix crash if GET/POST was called after end() without a new begin()
update double POST test to insure no crash if POST called after end()
test now are for both AxTLS and BearSSL
* fix small comment typo
