Add initregexp() call.

Don't call inittime() and initmath(), let config_*.c decide about those.

code.

cleared up.
(A function definition references its module's symbol table but
the symbol table of course references the function...)

a valid parse tree to caller, so caller must free the tree.

Document and fix code generation for try statements.
Use two bytes for all arguments.
Avoid duplicate entries in lists of constants and names.