joyent/http-parser — comment on commit b47c44d7a660d9ee6ab365864e345081f237b433
File: http_parser.c line 1739
By koichik:

@pgriess - With HTTP/1.0 or earlier, Keep-Alive is disabled by default. Therefore, I think that we do not need it. Keep-Alive is used if and only if the response has `Connection: Keep-Alive` (or legacy `Keep-Alive:`, but http-parser does not seem to support it).