doc: added more discussions for the potential race conditions in worker-level changeable data sharing to the "Data Sharing within an Nginx Worker" section. thanks Jon Keys for asking.
doc: bumped version to 0.9.12.
bugfix: ngx.req.raw_header(): we might change nginx's internal buffer pointers, which might cause bad side-effects.
refactor: ngx.req.raw_header(): simplified the implementation.
bugfix: ngx.req.raw_header(): buffer overflow and the "buffer error" exception might happen for massively pipelined downstream requests. thanks Dane Knecht for the report.
api: bumped version to 0.9.13.
doc: typo fix from tianchaijz in #419.
doc: made clarification about ngx.exec() requested by Dayo Akanji.
bugfix: fixed compilation error with nginx 1.7.5+ because nginx 1.7.5+ changes the API in the events subsystem. thanks Charles R. Portwood II and Mathieu Le Marec for the report in #422.
tests: 129-ssl-socket.t: use limited timeout threshold for the cosockets.
tests: added a passing test case for connecting to IPv6 addresses via cosockets.
tests: suppressed a warning from the test scaffold due to an expected [crit] error log message in 2 test cases.