[Perl/perl5] a6f195: Add an EXISTS method to NDBM_File

[Leon Timmermans via perl5-changes]

  Branch: refs/heads/leont/ndbm_exists
  Home:   https://github.com/Perl/perl5
  Commit: a6f19504102bd989c3ca9326de56a2e3c0f927fc
      
https://github.com/Perl/perl5/commit/a6f19504102bd989c3ca9326de56a2e3c0f927fc
  Author: Leon Timmermans <faw...@gmail.com>
  Date:   2022-07-28 (Thu, 28 Jul 2022)

  Changed paths:
    M ext/NDBM_File/NDBM_File.pm
    M ext/NDBM_File/NDBM_File.xs
    M t/lib/dbmt_common.pl

  Log Message:
  -----------
  Add an EXISTS method to NDBM_File