travis: Modify success-http-headers.
travis: Modify success-http-headers.

Travis CI seems to have changed their version of wget such that it no
longer prints this.

tommyip/zulip,rht/zulip,andersk/zulip,rishig/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,rht/zulip,timabbott/zulip,tommyip/zulip,showell/zulip,zulip/zulip,eeshangarg/zulip,shubhamdhama/zulip,synicalsyntax/zulip,shubhamdhama/zulip,brainwane/zulip,brainwane/zulip,rht/zulip,kou/zulip,hackerkid/zulip,dhcrzf/zulip,showell/zulip,punchagan/zulip,zulip/zulip,synicalsyntax/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,kou/zulip,Galexrt/zulip,mahim97/zulip,punchagan/zulip,timabbott/zulip,dhcrzf/zulip,timabbott/zulip,synicalsyntax/zulip,eeshangarg/zulip,eeshangarg/zulip,brockwhittaker/zulip,shubhamdhama/zulip,synicalsyntax/zulip,synicalsyntax/zulip,mahim97/zulip,Galexrt/zulip,zulip/zulip,jackrzhang/zulip,timabbott/zulip,timabbott/zulip,andersk/zulip,kou/zulip,showell/zulip,hackerkid/zulip,brockwhittaker/zulip,showell/zulip,kou/zulip,timabbott/zulip,rishig/zulip,andersk/zulip,rishig/zulip,jackrzhang/zulip,rishig/zulip,tommyip/zulip,rishig/zulip,synicalsyntax/zulip,jackrzhang/zulip,hackerkid/zulip,Galexrt/zulip,dhcrzf/zulip,Galexrt/zulip,rht/zulip,shubhamdhama/zulip,jackrzhang/zulip,brainwane/zulip,brainwane/zulip,hackerkid/zulip,shubhamdhama/zulip,brockwhittaker/zulip,andersk/zulip,hackerkid/zulip,mahim97/zulip,brockwhittaker/zulip,mahim97/zulip,kou/zulip,rht/zulip,shubhamdhama/zulip,mahim97/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,jackrzhang/zulip,zulip/zulip,eeshangarg/zulip,tommyip/zulip,kou/zulip,tommyip/zulip,Galexrt/zulip,dhcrzf/zulip,punchagan/zulip,Galexrt/zulip,mahim97/zulip,showell/zulip,dhcrzf/zulip,shubhamdhama/zulip,zulip/zulip,dhcrzf/zulip,jackrzhang/zulip,showell/zulip,andersk/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,brainwane/zulip,brockwhittaker/zulip,rishig/zulip,brainwane/zulip,tommyip/zulip,tommyip/zulip,zulip/zulip,jackrzhang/zulip,dhcrzf/zulip,eeshangarg/zulip,punchagan/zulip,punchagan/zulip,Galexrt/zulip,brockwhittaker/zulip,rishig/zulip,showell/zulip