[perl5-dbi/dbi] 48d1b4: Clarify docs for DBI::hash

[Tim Bunce]

  Branch: refs/heads/master
  Home:   https://github.com/perl5-dbi/dbi
  Commit: 48d1b48a0a0a3f8994c616894772304b67b2d6eb
      
https://github.com/perl5-dbi/dbi/commit/48d1b48a0a0a3f8994c616894772304b67b2d6eb
  Author: Tim Bunce <tim.bu...@pobox.com>
  Date:   2016-04-17 (Sun, 17 Apr 2016)

  Changed paths:
    M DBI.pm

  Log Message:
  -----------
  Clarify docs for DBI::hash