Revert "Remove deprecated bootstrap.php fallback"
Revert "Remove deprecated bootstrap.php fallback"

This reverts commit f8061bbca13b0cbaea418acedc03c008bbf8edcb.

We will keep this fallback in place, to avoid unnecessary breakage of
backwards compatibility for extension authors.

Removal is planned for the final 0.1 release.

flarum/core,flarum/core,datitisev/core,datitisev/core,datitisev/core,datitisev/core,flarum/core