by reformatting comments and removing blank lines.

It is not dependent on any root window and needs only be called once on
startup.

nxagentTriangles
nxagentTriFan
nxagentTriStrip

Improve code readability

Save some lines...

make the code more readable

This way we can remove lots of #ifdef DEBUGs

also drop unused return code

that macro fits better here since there's no transport
specific code.

This has nothing to do with the transport.

Some of them are unused, some of them were missing. Also add a list of
the available debug macros.