add DiskCryptor #582 and organize disk encryption section
show openSUSE by default #616
fix DiskCryptor link to EN version #582
Update index.html with note about proprietary browser addons

compromise for https://github.com/nylira/prism-break/pull/617
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
fixed formatting error in de.json
Update de.json with translations in i18n-mail-server-notes
Update de.json with formatting and readability improvements under i18n-xmpp-server-notes
Update de.json with readability and formatting improvements under i18n-sip-server-notes
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge pull request #630 from Cathryne/master

Update index.html with note about proprietary browser addons