Update URL for gay.com

[starfys]

As of 03 August 2017, gay.com has changed ownership. It appears that the website no longer has an HTTPS version, just an HTTP connection that redirects to https://vanguardnow.org/

This causes a problem in the "Web Connectivity" test in ooniprobe, which expects "https://gay.com" to resolve correctly.

Relevant line:
https://github.com/citizenlab/test-lists/blob/master/lists/global.csv#L582

More information:
This was tested and verified by performing

# Checks open ports
nmap gay.com
# Checks HTTPS
curl -v https://gay.com

from 3 locations:

• Home internet
• School internet (MTSU)
• DigitalOcean droplet (NYC)

On all 3 locations, port 443 does not show as open, and performing curl fails to connect using HTTPS

Cross-reference:
https://github.com/TheTorProject/ooniprobe-android/issues/106
ooni/probe-android#107