[LINUX5250] patch to fix scs2pdf and other massive SCS overhaul

[James Rich <james@xxxxxxxxxxx>]

Whew!  I've finally finished reworking scs2* to more completely 
implement the SCS stream.  I also fixed a bug in scs2pdf.  I've changed 
the structure of the scs2* programs to use callbacks with scs.c acting 
as a sort of SCS toolkit.

I discovered a long standing bug in all the scs2* programs:  They 
mishandle the AHPP command (scs2pdf uses this for bold which isn't 
always what is desired).  When a spooled file contains underlines the 
programs misbehave.  scs2pdf handles it by just making the underlines be 
bold, but the others are SOL for now.

scs2pdf had an additional AHPP bug in it that is fixed now (this is the 
bug that got me started on this whole process).

The patch is too large to post inline, so I've put it on my web server:

http://www.chowhouse.com/~james/tn5250-scs.patch

It should apply cleanly to current cvs (head) but there may have been 
some changes recently that I haven't tracked that could make trouble 
(there haven't been any changes to the files that I've been working on, 
so I'm optomistic).

Please test this out.  Or, send me your raw SCS output for some of your 
tricky spool files and I'll test 'em myself (use outputcommand = `cat > 
/tmp/output.scs` ).

James Rich