It's important that others understand the system before I keep adding to
the mystery. This is at least a good start.
It also obviates certain awkward design issues that have evolved over
time and need addressing. Note that it also mentions that `keep' is
marked for removal---this is the situation that prompted this
documentation; changes will be made to work toward its removal to
improve the terrible linker performance when given many thousands of
symbols defined in over 500 separate packages.
* src/symtable.xsl: Add menu for symbols.
* src/symtable/symbols.xsl: Added.