doc: added missing method name "get_keys" under "ngx.shared.DICT" and also fixed the method order. thanks George Bashi for the patch in #404.
bugfix: tcpsock:sslhandshake(): the "host" parameter did not accept the nil value.
doc: documented the new SSL cosocket feature.
doc: more clarification in the docs for the res.truncated flag returned by ngx.location.capture(). thanks Jon Keys for asking.
style: fixed tab indentation. thanks Tatsuhiko Kubo for the patch in #406.
doc: removed the SSL cosocket item from the TODO list.
use lua_pushliteral for string-literals.
bugfix: we did not check allocation failures while compiling the pattern for tcpsock:receiveuntil(). thanks Tatsuhiko Kubo for the patch in #407.
Merge pull request #408 from cubicdaiya/issues/use_luapushliteral

use lua_pushliteral for string-literals.
tests: fixed a test case to reflect latest change in ngx_set_misc.
bugfix: tcpsock:sslhandshake() incorrectly returned failures when the SSL handshake operation succeeded immediately.
tests: fixed a test case that could fail randomly.
bugfix: ngx.req.socket(true): it incrrectly returned the error "chunked request bodies not supported yet" for *raw* request sockets with chunked request bodies. thanks Xiaofei Yang for the report.