STUFF TO DO

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IMPROVE DOCUMENTATION

SIGNAL should be used to catch them bombs, when previous errors force 
a crash.

Improve portable.c to the level of usefulness, … la RN Configure

make a papplist for identifier, for .ZEXT and .UNDEFINE

this might create problems (try it out)
---
file a:
   foo = bar
 -
file b:
   bar   lda   foo
---

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Doku for Worker.c  NLINK65


This is the way PC, ORIGIN and DIFF work

   Files that are loaded

   +---------+   pc            +---------+   pc
   |         |   .             |         |   .
   |         |   .             |         |   .
   |  file1  | bytes           |  file2  | bytes
   |         |   .             |         |   .
   |         |   .             |         |   .
   +---------+ endpc           +---------+ endpc


            +-------------+ origin
            | +---------+ |   .
            | |         | |   .                            nù
            | |         | |   .       diff = origin - pc + ä bytes
            | |  file1  | |   .                            2
            | |         | |   .
            | |         | |   .
            | +---------+ | tbytes
            | +---------+ |   .
            | |         | |   .
            | |         | |   .
            | |  file2  | |   .
            | |         | |   .
            | |         | |   .
            | +---------+ |   .
            +-------------+ code_end

ù I can't believe it. I actually wrote something mathematical.
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h_global[0] and relatives are never used? WRONG!! They are used with
those special VfL variables.