Another follow-up from yesterday's doc reviews

[Robert Goldman]

The comments in the file say that we *must* use load-asdf to load a .asd
file, but not *WHY* we must do so.

Why is this necessary?

E.g., I have a makefile that lets me build a number of executables using
my choice of lisp.

Each time, to build the executable, it starts a lisp, loads the ASDF
file (using --load or equivalent), and then uses asdf:make.

I could use --eval (asdf:load-asdf "myfile.asd") but why is it mandated?