Add types to the safeHeader() docblock.
Add missing character sets to the http content types.
Add the character set to the dispatcher.

Note that the line-endings were also changed in this commit.
Default the character set to utf-8.
Update the dashboard font to the https endpoint.

This change helps prevent browser errors while on https.
Merge pull request #2340 from vanilla/hotfix/https-dashboard-font

Update the dashboard font to the https endpoint.
Merge pull request #2277 from vanilla/hotfix/sso-connect-name

Take the changed username when connecting through SSO.
Merge pull request #2249 from vanilla/hotfix/content-encodings

Add missing character sets to the http content types.
Merge branch 'master' of github.com:vanilla/vanilla into stage