Releases for Aegir HTTPS

#3086056: Update bundled dehydrated

Fix a regression #3020747: Don't add SSL config to configuration files if the crt files aren't there/aren't readable. (especially redirects)

See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.17/

See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.16/

See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.14/

Upgrade procedure

The following should do the trick in most cases, switching from previous alpha releases. Make sure that the destination is correct such that you overwrite the older version. Drush should ask you for confirmation when running the command. If it doesn't, change the destination to match wherever you have it installed already.