Enable multiple web sessions
Summary:
Conduit already has multiple-session code, just move it to the main
establishSession() method and set a web session limit larger than 1.
NOTE: This will log everyone out since we no longer look for the "web" session,
only for "web-1", "web-2", ..., etc. Presumably this doesn't matter.
Test Plan:
Applied patch, was logged out. Logged in in Safari. Verified I was issued
"web-1". Logged in in Firefox. Verified I was issued "web-2".
Kept logging in and out until I got issued "web-5", then did it again and was
issued "web-1" with a new key.
Ran conduit methods and verified they work and correctly cycled session keys.
Reviewed By: tuomaspelkonen
Reviewers: tuomaspelkonen, jungejason, aran
Commenters: jungejason
CC: rm, fzamore, ola, aran, epriestley, jungejason, tuomaspelkonen
Differential Revision: 264