[bug 989124] Use correct CDN url for about page video
bug 973967 - Refresh Get Involved page

This removes the 15th Anniversary slideshow.
fix bug 984602 - update MDN logo
Merge pull request #1832 from mozilla/bug-973967-get-involved-refresh

bug 973967 - Refresh Get Involved page
Map 28-30 releasenotes to bedrock-- fix bug 989423

28 release channel
29 beta and release
30 aurora, beta, and release
Add honeypot to contribute form. Remove captcha. Bug 973967.
Merge pull request #1842 from jpetto/bug-973967-honeypot-contribute-form

Add honeypot to contribute form. Remove captcha. Bug 973967.
Add cache_page decorator to release_notes view

Also to system_requirements
Simplify regex with multiple rules
Merge pull request #1841 from jgmize/rna-28-29-30-apache

Map 28-30 releasenotes to bedrock-- fix bug 989423