http: Replace "in" usage with "=== undefined"
authorisaacs <i@izs.me>
Thu, 27 Dec 2012 17:13:58 +0000 (09:13 -0800)
committerisaacs <i@izs.me>
Sat, 29 Dec 2012 23:32:25 +0000 (15:32 -0800)
commit9785ab605746593601752a278c93fdc784462115
tree28ab0ab5b79214ec8ae46dde49e3ed59ee66edad
parentae1b0ca7a598438330854ccd83bae13db3e7d2b0
http: Replace "in" usage with "=== undefined"

Speeds up http benchmarks.
lib/http.js