Log Message:
shells/pbosh: Update to 20191025

Based on schilytools release from 2019-10-25.

Changelog
=========
- include/schily/wchar.h: Some fallback definitions for
  mbsinit() mbrtowc() wcrtomb() have been moved to make them always
  visible and not only in case that <wchar.h> exists.

- include/schily/wchar.h: Before, we checked for HAVE_ISWPRINT to catch
  the HP-UX-10.20 case where wchar_t is in stdlib.h. Now we check
  (SIZEOF_WCHAR == 0 || SIZEOF_WCHAR_T == 0) as this works on Ultrix as
  well.

- libgetopt: The getopt() function now supports options in the form:

     +o, ++long-option or +long-option

  if the optstring starts with a '+'. A new exported variable
  "optflags" has the bit "OPT_PLUS" set, in case that an \ 
actual option
  starts with '+'.

  If more than one of the flag characters ':', '+' or "()" are used,
  "()" must be last.

- Bourne Shell: The testsuite no longer tries to check ISO-8859-1 strings
  as we cannot set this up reliably on all platforms and as Mac OS does
  not allow to create the related filenames.

- Bourne Shell: The getopts(1) builtin command now supports options in.
  the form:

     +o, ++long-option or +long-option

  if the optstring starts with a '+'. The shell variable "$NAME" has
  a leading '+' in case that an actual option starts with '+'.

  Note that this makes getopts(1) in the Bourne Shell compatible at
  shell script level to the extensions in the getopts(1) implementation
  in ksh93 for:

     -o/+o   Short options with either a leading - or +

     --long  GNU style long options as aliases to short -o options

     ++long  GNU style long options as aliases to short +o options

  Our enhancements to support:

     -long   UNIX style long options as aliases to short -o options

     +long   UNIX style long options as aliases to short +o options

     -       Long options the have no related short option

  Are not supported by ksh93.