ReleaseEngineering/How To/Handle a report-today.sh message

The report-today.sh email message expose builds that are "stuck" in the redis cache. You can clear these error emails by doing the following:

$ telnet redis01.build.scl1.mozilla.com 6379
Trying 10.12.48.24...
Connected to redis01.build.scl1.mozilla.com (10.12.48.24).
Escape character is '^]'.
DEL builds:30892314
:1
QUIT
+OK
Connection closed by foreign host.

Replace 30892314 with the appropriate id from the JSON email message. This *should* be log_url['id'].