Update from 1.7.1 to 1.8.0.

<ChangeLog>

*) Change: now three numbers are always used for versioning: major,

minor, and patch versions.

*) Change: now QUERY_STRING is always defined even if the request does

not include the query component.

*) Feature: basic internal request routing by Host, URI, and method.

*) Feature: experimental support for Java Servlet Containers.

*) Bugfix: segmentation fault might have occurred in the router process.

*) Bugfix: various potential memory leaks.

*) Bugfix: TLS connections might have stalled.

*) Bugfix: some Perl applications might have failed to send the response

body.

*) Bugfix: some compilers with specific flags might have produced

non-functioning builds; the bug had appeared in 1.5.

*) Bugfix: Node.js package had wrong version number when installed from

sources.

</ChangeLog>