http library: Always fork before reading request
http library: Always fork before reading request

It turned out that clients not sending a full request will stop
us from responding to further requests. This patch leverages the
situation a bit by always forking before handling the request,
but we still have DoS situations.

Reviewed-by: ultrotter


ganeti/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,bitemyapp/ganeti,andir/ganeti,yiannist/ganeti,mbakke/ganeti,mbakke/ganeti,dimara/ganeti,apyrgio/snf-ganeti,ganeti/ganeti,andir/ganeti,mbakke/ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,yiannist/ganeti,dimara/ganeti,apyrgio/snf-ganeti,bitemyapp/ganeti,apyrgio/ganeti,onponomarev/ganeti,grnet/snf-ganeti,leshchevds/ganeti,grnet/snf-ganeti,yiannist/ganeti,apyrgio/ganeti,onponomarev/ganeti,leshchevds/ganeti