…ls (OCamlPro#8)

* Support EBCDIC symbolic characters in alphanumeric literals

* Do not error upon symbolic EBCDIC characters in literals for non-GCOS dialects

* Decode EBCDIC character using machine character set

[GCOS] fix EBCDIC symbolic-chars as ordinals (1..256 instead of 0..255)

[GCOS] New test for EBCDIC symbolic-chars, and fix doc for related option

[GCOS] Substitute `ebcdic-symbolic-characters` for `gcos-ebcdic-literals`

Drop an unused warning in `cobc/scanner.l`

[GCOS] Warn when EBCDIC symbolic character strings comprise extraneous separators

Better test for symbolic EBCDIC characters; and fix ChangeLogs

Honor -febcdic-table when decoding symbolic EBCDIC characters

Fix in PR27 for new ebcdic-table options

PR27 use symbolic enums

fix

Current implementation does not conform to standard (COPY REPLACING
and REPLACE are supposed to be in two successive passes instead of
applied together), and has various bugs.

This version is probably less efficient, but better conforms to the
standard.

Limitations:

* This first version only modify the replacements during
  preprocessing, not the ones during the listing printing.

* Since REPLACE are interpreted *before* the COPY REPLACING, they
  cannot be modified by them. A conforming implementation would
  interpret REPLACE strictly after COPY REPLACING.

…rror

  0106              MOVE CLE(1)               TO CLE(2)
  0107              CALL "FLXDBO" USING LECSG ERREUR DEC(2) PDF-DBO-ART
  0108 >            IF ERREUR-NIV ZERO AND CLE2-4(1) = "PDF"
  0109                 MOVE PDF-DBO-INF(1:LGR-PDF)         TO PDF
  0110                 IF COD-PDF = PDF-NUMERO-ETAT