This reverts commit f7a07113.

The problem with this approach is that if we have sites in the platform
and fail to verify it, removing the apache config would actually break
the platform even more. We do not want that.

What we want is a provision-install on platforms that can be rolled back
properly too. It's harder than this.

when drush make fails, the apache config is already created and wasn't
cleaned up

we hook into the rollback by adding a new magic hook through
command_invoke() that will cascade through the current context and call
the right rollback hook.

we implement one for the platform, but we probably need to implement one
for servers and sites too.

this is to distinguish with the get_ip_certificate() (!!) function
which is a real "get" whereas assign *does* something

Change the method of detecting if we should add the Aegir API version to the settings.php file.

#1123176 by sanduhrs - switch to mktemp instead of tempfile in upgrade script to retain CentOS out-of-the-box compatibility

This reverts commit 7e43a156.

we rely on readlink -f, which is not really cross-platform, but the
alternative is not supporting symlinks properly...

that way we do not need to check if the path is in the right directory
at all, we just remove the link, who cares if it points to a place
outside the site dir if we do not dereference it?

improvements;

 * we close directories as we go
 * coding style

This reverts commit b269e71a.

This reverts commit 321b1522.

hosting-resume doesn't exist in pre 1.0-rc4, so this fails during upgrades

we'll remove this once everybody hit at least 1.0-rc4 (or say 1.0)