With the ping.al.org domain added in[1] and a updated networkmanager package shipped[2], we can now remove the file from the main domain.
[1] 498d5304 ("Merge branch 'ping' into 'master'")
fabccd0f (""Move" NM connectivity check file to a subdomain")
[2] https://github.com/archlinux/svntogit-packages/commit/fb573170fc63c18f64eb4f155ed64a966a61b037
To be merged +1 month from now.
Ref: #239 (closed), !311 (merged)