Add freenode #reactjs link to support.md (#8270)
Add freenode #reactjs link to support.md (#8270)

* Add freenode #reactjs link to support.md

* Changed irc link to http webchat link.

(cherry picked from commit 9d201918bf4432fd3e231088d4cdb8146a1c7861)

with-git/react,with-git/react,with-git/react,with-git/react,with-git/react,with-git/react,with-git/react