Move the provision help to hosting, severely reducing code duplication and simplifying provision even further

See: #336431

Test if apache can be restarted during verify, and fix the documentation for the hostmaster mysql user (#336431)

Test if apache can be restarted during verify, and fix the documentation for the hostmaster mysql user (#336431)

Related to: #336431

Ported from D5 branch

Related to: #336431

Closes: #264775

warnings most of the time.

Closes: #264775

#321942 (primarily) - working config file generation and synch command. Also cleaned up variables passed to the system so the site_ prefix is no longer used.

fix for #319299. Now detects language and install profile correctly. Also fixed a missing variable_set when installing new sites using aegir.

grant ALL PRIVILEGES instead of just create/drop to the mysql root user as the latter is not sufficient to create mysql users. do not flush privileges as GRANT already does that.

I managed to never commit the provision.install file, which sets the module weights, and makes sure that restore happens in the right order.
This fixes the problem I had where it would try to import the database dump before actually having extracted it.
Fixed the weird chgrp error message it was having (which was just an issue in logging, not in the actual chgrp call)

Attempt to capture drupal error messages and integrate them with provision errors, to keep them in the correct order

Do checking to see that the tarball has been correctly extracted. Remove db password from log info returned to hosting.

Significantly improved the requirement checking and contextual help. All this stuff is integrated into the wizard, and eventually will add queues from provision to hosting to flag exact errors. Introduce some simple jquery and css to handle collapsible and collapsed help text, to clean up the pages a bit

Refactor the help code a bit, by adding a _provision_requirements function, which calls _provision_$req_requirements() functions, containing the actual help text. Allows me to much more easily integrate help text into forms. Also added some weights to the db_server and web_server forms, so that they can be more easily manipulated

Missing return to db create function. Added additional error checking. Become more stringent about regenerating the config files. Wrong path to database.sql