[Perl/perl5] d76046: Add a usage note about the "l" modifier.

[Shlomi Fish via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: d760460651a8e8be00da9930a8788102b42db5a7
      
https://github.com/Perl/perl5/commit/d760460651a8e8be00da9930a8788102b42db5a7
  Author: Shlomi Fish <shlo...@shlomifish.org>
  Date:   2020-11-23 (Mon, 23 Nov 2020)

  Changed paths:
    M pod/perlfunc.pod

  Log Message:
  -----------
  Add a usage note about the "l" modifier.