bugfix: use of ngx.exit() to abort pending subrequests in other "light threads" might lead to segfault or request hang when HTTP 1.0 full buffering is in effect.
added a test case to exercise a bug in ngx_gunzip module with which ngx.flush(true) could hang forever. thanks Maxim Dounin for the catch. to make this test pass, we need the gzip_flush_bug patch applied to the nginx core.
doc: bumped version to 0.9.1; also added a new section "System Environment Variable Support".
doc: updated the docs for ngx.req.socket(raw) to reflect the recent change that allows reading raw request body data directly.
documented the new lua_use_default_type directive.
feature: added new API function ngx.config.prefix() to return the nginx server prefix path.
bugfix: localizing the coroutine.* API functions in init_by_lua* for future use in contexts like content_by_lua* might hang the Lua code. thanks James Hurst for the report in #304.
merged branch "master" to "ffi".