Beyond changes to the build system, this includes fixing up the sample
freebsd.mc configuration for changes in defaults and syntax, removing
outdated documentation, and updating the release notes.
snprintf function itself is still #ifdef'd out by conf.h. This allows this
program to link when compiled without optimization. With optimization,
the call to quad_to_string gets removed by the compiler. Unfortunately
the linker still links in the quad_to_string function even though it
isn't called. 8-(
