Issue #2285825 by helmo: Workaround for Jenkins job status reported incorrectly.
Reduce the number of warnings, providing an invalid email address
Comment fixes
move the first d() initialiser back into hook_drush_init() and
document

this really doesn't belong to _provision_drush_check_load() at all,
which looks at sys_getloadavg()...

i am not sure the comment is accurate, but it's based on commit
archeology dating back from 2010, see commits:

0c4d648defcdef086e9038ac4e76bf4e52abdbc0
f7b8dabe051f7f32d62b47bf55b53592f2b4c5f3

this was done trying to track down #2281983