Skip aliases packages when looking for plugins.
Ensure detected extensions have valid package names
Merge pull request #2508 from simensen/plugin-manager-skips-alias-packages

Skip aliases packages when looking for plugins.
Make PluginManager::loadRepository public
Merge pull request #2510 from simensen/plugin-load-repository-made-public

Make PluginManager::loadRepository public
Merge pull request #2509 from glenjamin/opcache-ext

Ensure detected extensions have valid package names