Currently, the log macro requires at least one argument after the format string, because of the way the preprocessor handles varargs macros. We can hide some of that irritation by pushing the extra arguments into a varargs function.
I.e. mallloc, free, the allocx API, the posix extensions.
This sets up a hierarchical logging facility, so that we can add logging statements liberally, and turn them on in a fine-grained manner.