Issue #2794915 by Jon Pugh: Refactor database permissions granting to allow scalability to arbitrary web servers

Issue #2731471 by Jon Pugh, ergonlogic: Provision backup-delete command is too strict if it doesn't have "backups" passed to it

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:

0c4d648d
f7b8dabe

this was done trying to track down #2281983

we are not getting all possible contexts because there's no easy way
to enumerate them, so instead we just don't check

Issue #1513678 by Jon Pugh, fastangel, Steven Jones: Fixed Hooks based on TASK_NAME should handle task names with dashes in them.

Issue #1471928 by Steven Jones: Fixed provision-save: Unknown options: --context_type(), --platform, --server, --db_server(), --profile, --client_name(), --aliases.

Issue #1750974 by Steven Jones: Fixed Unable to pass working-copy or backend-only to hostmaster install.

Issue #1440646 by tstoeckler, cafuego, mig5: Make Drush be runnable as Root with Provision installed.