add h2o_http1client_cancel
h2o_reserve_input_buffer can now be used for allocating a certain amount of memory
temporary
prefix handler functions with `h2o_<handler_name>_`
Merge branch 'master' into kazuho/expr/revproxy
[wip] implement reverse proxy
fix the misdesigned per-context configuration; every handler/filter/logger should have a slot in the context
Merge branch 'kazuho/refactor/per-context-config' into kazuho/expr/revproxy
it works