support.whispersystems.org is now available through TLS, but is not
included in the HSTS preload list. Hence, these links are vulnerable
to SSL stripping until the user visits the site over HTTPS for the
first time. Changing these links to https:// ensures that the user
always gets the encrypted version of the support website.
Closes#6056
// FREEBIE
john gravois
Nicholas Rizzio
2-4601
Justin Tracey