resulttype and first pass)
* made handling of read(ln)/write(ln) processor independent
* moved processor independent handling for str and reset/rewrite-typed
from firstpass to resulttype pass
* changed names of helpers in text.inc to be generic for use as
compilerprocs + added "iocheck" directive for most of them
* reading of ordinals is done by procedures instead of functions
because otherwise FPC_IOCHECK overwrote the result before it could
be stored elsewhere (range checking still works)
* compilerprocs can now be used in the system unit before they are
implemented
* added note to errore.msg that booleans can't be read using read/readln
+ nopt.pas, nadd.pas, i386/n386opt.pas: optimized nodes for adding strings
and constant strings/chars together
* n386add.pas: don't copy temp strings (of size 256) to another temp string
when adding
