It now exports a Var interface (anyone can export their own custom var types now), so users need to create and manage their own vars and mark them as exportable via the Publish function. They are exposed via /debug/vars.
R=r,rsc
APPROVED=r
DELTA=605 (314 added, 186 deleted, 105 changed)
OCL=28143
CL=28239
This handles integer-valued vars in a singleton struct, and exports functions
for incrementing, setting and getting those vars, as well as rendering all the
vars in a standard format.
Demonstrate the use of the exvar package in the http/triv server.
R=dcross,r
APPROVED=r
DELTA=122 (122 added, 0 deleted, 0 changed)
OCL=27617
CL=27622
