[PATCH 0 of 3] Tests: add propagate_connection_close tests

[Shawn J. Goff]

These patches add tests for my propagate_connection_close patch for
the upstream module. Due to the nature of this change, there were a
couple modifications required to the lib/Test/Nginx.pm to work with
chunked responses. I reran the test suite with all features compiled
in and it still passes, but some tests were skipped because I don't
have the needed libraries installed.