Foreman » Smart Proxy

fixes #15985 - Pxegrub2 tftp filename prefix

Fixes #15864 - Pxelinux alias variant for Syslinux

Fixes #12633 - Pxegrub2 variant and multiple configs

Fixes #14618 - refactored module initialization

to allow for:
    - support for multiple simultaneous providers
    - programmatically defined settings
    - custom validators
    - ability to customize module loading

Also includes support for constructor-based dependency injection

Fixes #14931 - TFTP class instantiating fixed

Fixes #11318 - HttpDownloads.start_download returns instance

instead of `true`. Allows to join processes, useful for discovery image
plugin.

Fixes #11103: tftp tests no longer fail when module config file contains changes.

refs #9299: prefixes ending with a '/' do not get appended a '-'

Thanks to Dmitry Kireev for the original PR.

fixes #7660: fixes first bunch of rubocop warnings

fixes #7235: dhcp tests are now order-independent