Enable different http_parser versions.
Enable different http_parser versions.

Update to enable support for different versions of http_parser then
what is currently bundled in Mesos.

From: Timothy St. Clair <29ae796e4f5492d73061ff429bb678dbe89fef6d@redhat.com>
Review: https://reviews.apache.org/r/16764

andschwa/mesos,yuquanshan/customizedMesos,jpeach/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,gsantovena/mesos,abudnik/mesos,zmalik/mesos,kaysoky/mesos,craimbert/mesos,dforsyth/mesos,chhsia0/mesos,verizonlabs/mesos,andschwa/mesos,neilconway/mesos,kaysoky/mesos,Gilbert88/mesos,jpeach/mesos,chhsia0/mesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,zmalik/mesos,asamerh4/mesos,reneploetz/mesos,zmalik/mesos,gsantovena/mesos,craimbert/mesos,neilconway/mesos,chhsia0/mesos,chhsia0/mesos,craimbert/mesos,reneploetz/mesos,verizonlabs/mesos,kaysoky/mesos,Gilbert88/mesos,andschwa/mesos,asamerh4/mesos,jpeach/mesos,yuquanshan/customizedMesos,andschwa/mesos,reneploetz/mesos,abudnik/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,yuquanshan/customizedMesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,kaysoky/mesos,verizonlabs/mesos,asamerh4/mesos,asamerh4/mesos,verizonlabs/mesos,dforsyth/mesos,neilconway/mesos,jpeach/mesos,abudnik/mesos,zmalik/mesos,kaysoky/mesos,asamerh4/mesos,Gilbert88/mesos,neilconway/mesos,yuquanshan/customizedMesos,zmalik/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,kaysoky/mesos,craimbert/mesos,Gilbert88/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,Gilbert88/mesos,craimbert/mesos,dforsyth/mesos,reneploetz/mesos,jpeach/mesos,andschwa/mesos,andschwa/mesos,yuquanshan/customizedMesos,reneploetz/mesos,chhsia0/mesos,verizonlabs/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,andschwa/mesos,chhsia0/mesos,gsantovena/mesos,dforsyth/mesos,gsantovena/mesos,craimbert/mesos,abudnik/mesos,dforsyth/mesos,zmalik/mesos,neilconway/mesos,abudnik/mesos,asamerh4/mesos,chhsia0/mesos,asamerh4/mesos,zmalik/mesos,craimbert/mesos,dforsyth/mesos,abudnik/mesos,kaysoky/mesos,reneploetz/mesos,jpeach/mesos,Gilbert88/mesos,jpeach/mesos,Gilbert88/mesos