flake8: rename loop variable in 'for sendto in sendto:' Flake8 reported 'B020 Found for loop that reassigns the iterable it is iterating with each iterable value.' Renamed loop variable to to_addr. There is a similar construct with a loop over bcc_sendto with a 'bcc' loop variable. So I assume the loop varaible can be chnaged w/o issue. Codecov shows all the affected lines are being tested and the tests I ran with testmon that should cover that code all passed. We shall see if a full CI run passes.

#! /bin/sh

# if there are multiple trackers, d=demo t=tracker ...
# returns last one for testing that server is up. Does not test
# each tracker.
tracker=$(ps -ef | sed -ne '/roundup-server/s/^.*\s\(\w*\)=.*$/\1/p')
wget -q -O /dev/null --no-verbose http://localhost:8080/${tracker:-demo}/