The "subdomain" label is redundant, to the extent it's even
accurate -- this is really just the URL we want to display,
which may or may not involve a subdomain. Similarly "external".
The former `external_api_path_subdomain` was never a path -- it's a
host, followed by a path, which together form a scheme-relative URL.
I'm not quite convinced that value is actually the right thing in
2 of the 3 places we use it, but fixing that can start by giving an
accurate name to the thing we have.
Update Email, Beanstalk, Hubot, JIRA, and Trello integrations
links.
The Hubot integrations section (/integrations#hubot-integrations)
was removed in an earlier redesign of /integrations. This commit
replaces the link with the hubot-scripts organization on
Github, which displays the comprehensive list of all integrations
available via Hubot.
Fixes#5875.
Eeshan Garg
Greg Price
Jack Zhang