Add transparent support for EventSource streaming. (#12887)
Add transparent support for EventSource streaming. (#12887)

This activates if the streaming base URL does not start with "ws".
All currently-live streaming base URLs start with "wss://".
rainyday/mastodon,abcang/mastodon,kirakiratter/mastodon,pinfort/mastodon,theoria24/mastodon,yukimochi/mastodon,abcang/mastodon,Ryanaka/mastodon,tootcafe/mastodon,tri-star/mastodon,MitarashiDango/mastodon,musashino205/mastodon,maa123/mastodon,koba-lab/mastodon,imas/mastodon,Nyoho/mastodon,Kirishima21/mastodon,gol-cha/mastodon,im-in-space/mastodon,kazh98/social.arnip.org,tootcafe/mastodon,imas/mastodon,abcang/mastodon,masto-donte-com-br/mastodon,tootsuite/mastodon,koba-lab/mastodon,ykzts/mastodon,ykzts/mastodon,maa123/mastodon,pinfort/mastodon,gol-cha/mastodon,ikuradon/mastodon,tootsuite/mastodon,primenumber/mastodon,ikuradon/mastodon,theoria24/mastodon,tri-star/mastodon,MitarashiDango/mastodon,danhunsaker/mastodon,yi0713/mastodon,koba-lab/mastodon,masto-donte-com-br/mastodon,gol-cha/mastodon,koba-lab/mastodon,Ryanaka/mastodon,h3zjp/mastodon,ykzts/mastodon,cobodo/mastodon,lindwurm/mastodon,primenumber/mastodon,glitch-soc/mastodon,lynlynlynx/mastodon,lynlynlynx/mastodon,MitarashiDango/mastodon,cobodo/mastodon,ikuradon/mastodon,tri-star/mastodon,cobodo/mastodon,rainyday/mastodon,masto-donte-com-br/mastodon,dunn/mastodon,kazh98/social.arnip.org,maa123/mastodon,im-in-space/mastodon,pinfort/mastodon,h3zjp/mastodon,danhunsaker/mastodon,danhunsaker/mastodon,ikuradon/mastodon,kirakiratter/mastodon,musashino205/mastodon,musashino205/mastodon,kirakiratter/mastodon,Ryanaka/mastodon,masto-donte-com-br/mastodon,gol-cha/mastodon,Ryanaka/mastodon,im-in-space/mastodon,rainyday/mastodon,rainyday/mastodon,im-in-space/mastodon,glitch-soc/mastodon,danhunsaker/mastodon,tootcafe/mastodon,lindwurm/mastodon,kirakiratter/mastodon,tri-star/mastodon,abcang/mastodon,glitch-soc/mastodon,ykzts/mastodon,theoria24/mastodon,yukimochi/mastodon,musashino205/mastodon,yi0713/mastodon,yi0713/mastodon,dunn/mastodon,Kirishima21/mastodon,pinfort/mastodon,tootcafe/mastodon,lindwurm/mastodon,Kirishima21/mastodon,Nyoho/mastodon,glitch-soc/mastodon,imas/mastodon,tootsuite/mastodon,lynlynlynx/mastodon,maa123/mastodon,Nyoho/mastodon,cobodo/mastodon,MitarashiDango/mastodon,primenumber/mastodon,dunn/mastodon,yukimochi/mastodon,yi0713/mastodon,h3zjp/mastodon,kazh98/social.arnip.org,tootsuite/mastodon,yukimochi/mastodon,dunn/mastodon,primenumber/mastodon,kazh98/social.arnip.org,theoria24/mastodon,Kirishima21/mastodon,lynlynlynx/mastodon,lindwurm/mastodon,imas/mastodon,h3zjp/mastodon,Nyoho/mastodon