Comment 54 for bug 186920

$ env |grep -i proxy
http_proxy=http://xxx.yyy.zzz.com:8080

$ strace -e trace=network bzr launchpad-login ensonic
...
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(443), sin_addr=inet_addr("91.189.89.222")}, 16) = -1 EINPROGRESS (Operation now in progress)
getsockopt(4, SOL_SOCKET, SO_ERROR, [110], [4]) = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(443), sin_addr=inet_addr("91.189.89.223")}, 16) = -1 EINPROGRESS (Operation now in progress)
getsockopt(4, SOL_SOCKET, SO_ERROR, [110], [4]) = 0
bzr: ERROR: Connection error: curl connection error (couldn't connect to host)
on https://launchpad.net/~ensonic/%2Bsshkeys

where "91.189.89.223" is "launchpad-net.nutmeg.canonical.com"