Mostly, http -> https

Update KNPRadBundle to KNP Rad Components

I don't see why this should be awesome. PHP offers a CSPRNG and mt_rand and covers all use cases well.

- Added topic-specific Aura libraries.
- Linked Aura Framework directly.
- Added Aura as a component library.
- Added PHP-PDS website.
- Moved Radar to micro-frameworks.
- "Typo" fix on MLAPHP ("moderni(s|z)ation")

- Remove HybridAuth because it's dead

- Added SocialConnect/Auth library

Bad https == not awesome php

primary source, github description: https://github.com/thephpleague/shunt
secondary source: no longer listed on https://thephpleague.com/#packages

Update Disco description

Add Disco to Dependency Injection section.

Add yasumi

Remove deprecated assetic from the recommendations

Update README URLs based on HTTP redirects

Remove Icicle from list

Icicle is deprecated as per the repository readme file.

* Added Porter to Third Party APIs section.

* Moved Porter to Data Structure and Storage section.

* Corrected Porter's description to be API-agnostic.

* Added Porter to Third Party APIs section.

* Moved Porter to Data Structure and Storage section.

Add PHPSpreadsheet (successor of PHPexcel) to Office section.

Also mark PHPexcel as unmaintained.

Extract podcasts from videos section into its own section

Use https:// prefix for redis.io to fix failing build of Url Check

Symfony version updated