Less than operator for bounded_version_vector.
Better?
Remove http_parser submodule, because...
Squashed 'src/third_party_lib/http_parser/' content from commit 3f7ef50

git-subtree-dir: src/third_party_lib/http_parser
git-subtree-split: 3f7ef500bdcc01c06ac6d18a38fb1c441a9b9c60
Git subtree for http_parser.
Merge commit '38b6a2a69ab64fa9f7155520ed888c9edd76d80f' as 'src/third_party_lib/http_parser'