www.foo.com:80 if the server uses the default port of 80.

initialized correctly.

used, must have a value.  This is done by specifying None as a default
value.

Also tried to make indenting a little bit more automagic.

implicitly acquire roles even for explicit acquirers.

inst and parent in filter.

that multiple calls to setHeader to not replace earlier header
settings for accumulated headers.

properties.

Added Splitter.