741561 - No useful error message when chat connect fails

Status: NEW

(Chat Core :: IRC, defect)

Description

[Ben Bucksch (:BenB)]

Reproduction:
1. Configure a new IRC account, with IRC hostname "www.doesnotexist.invalid"
2. Finish wizard, including "Connect now"

Actual result:
"Your chat accounts are not connected" (completely unhelpful - should I press something? Should I wait? What happens?)
After clicking on "Show chat status", you see:
"Error: Lost connection to server".
That's not only completely useless, but simply wrong. There is no server www.doesnotexist.invalid, you can't have had a connection to it, and thus can't have lost it.

Expected result:
* www.doesnotexist.invalid -> "Server not found (DNS resolve failed). Please check the hostname in preferences."
* www.mozilla.org -> "Server does not seem to be an IRC server."
* irc.freenode.org with wrong proxy (bug 741536) - > "HTTP/1.0 400 Bad Request" or "Server does not seem to be an IRC server."